If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k+9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=k/999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999
We move all terms to the left:
k+9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999-(k/999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999)=0
We add all the numbers together, and all the variables
k-(+k/999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999)+9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=0
We add all the numbers together, and all the variables
k-(+k/999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999)=0
We get rid of parentheses
k-k/999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999=0
We multiply all the terms by the denominator
k*999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999-k=0
We add all the numbers together, and all the variables
-1k+k*999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999888888888888888888888888888888888888888888999999999999999999999999999999999999999999999999999999999999999999998766433333333333333333333333333333333333333333333336666666666666666666666666666666666666666666666666666666666669999999999999999999999999999999=0
Wy multiply elements
-1k+INFk=0
| k+9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 | | -6+r=-6 | | (-5n)-8(1+7n)=-8 | | (8x+7)°=(9x-4)° | | 0.12(y-8)+0.02y=0.10y-0.9 | | 6x240=40x | | 98k-498-9497959-984753085385095093858=k/99999999999999999999999999999999999999999999999999999999 | | 6x-42=10x+6 | | p=0.75p+0.56(1-p) | | -6-1/2n=1 | | 17=x(x+7) | | C(x)=0.20x+15.00 | | |6x+7|-5x=2 | | -8n-3n=22 | | -33=-3x-3(-3x-3) | | 0.06(y-1)+0.04y=0.02y-0.1 | | -4(-c-8)=- | | 1.1331=c^2 | | 19x-4=95 | | a-6-7=-6 | | 5(3n-1)=8 | | 3x+96=90 | | 8(5-h)=2(2h-7) | | 44=1000l | | -1(x+1/2)-5/2=18 | | 2(n–5)=36 | | 3a/a=12 | | -4x+3(2x-13)=-57 | | -6+4x=-4+3x-2+x | | 9y+2+(5y+9)=18y-13 | | -3x+24=-7x+4 | | (-2r-3=-19 |