If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x+1/x-5+5 = -3/(x^2)-25 // + -3/(x^2)-25
1/x+1/x-(-3/(x^2))-5+5+25 = 0
1/x+1/x+3*x^-2-5+5+25 = 0
2*x^-1+3*x^-2+25 = 0
t_1 = x^-1
3*t_1^2+2*t_1^1+25 = 0
3*t_1^2+2*t_1+25 = 0
DELTA = 2^2-(3*4*25)
DELTA = -296
DELTA < 0
x belongs to the empty set
| 10y=42+2x | | 6=m/4+3 | | -1/2u=14 | | s=3n+3w | | x^2-5x+90= | | t-(-3)=4 | | 7=2z+3 | | q+2/2+q-3/3=5/2 | | 40+40(0)+1=0 | | 5(6t+1)-11=T-(t+5) | | 2+2-1=5 | | 6/7y+9/y=1 | | -6*-5+7= | | -6*5+7= | | 5x^2-6x-k=0 | | 4(3y-7y+4)=1 | | 0=-16x^2+37x-20 | | x-1/2=-51/2 | | 8x/3=24 | | 24x^3+44x^2=8x | | 1/4(3-2x)=1/2(3/2-x) | | 6x^2+9x^4-4x^2-x^4-2x^2= | | x(x+15)=x^2 | | x(x+15)=2 | | (2x+2)(7x^2-4x-7)= | | 4x-5=-3x | | (k+7)2=289 | | (3x)/(2x+10)=1+1/(x+5) | | 12(1/3+1/2) | | X^5+x-887=0 | | 5-3x+2=19 | | 8p+2=4p-10x |