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 = 0
x = 0
x in (-oo:0) U (0:+oo)
x^-2*((-3*x^7)/12) = 0
-1/4*x^5 = 0 // : -1/4
x^5 = 0
x = 0
x in { 0}
x belongs to the empty set
| 6(x+8)=5(x+4) | | ((3+y)/2)-((2y-9)/8)=((5y+3)/4) | | 2t+6=22 | | 5*n+2=n*8-11 | | 3*a+3*b+4*c=205 | | 6x-6=2(x+1)+4x-8 | | 4x+2=3x+8-x | | 7/9*5/7*5/9 | | -19x=3/5-38 | | 12+4y-2y-9=10y+3 | | 2x-5x=-6x+12 | | 5a=-3a | | 14x-2y=14 | | 4/7*3/8*5/7 | | -x+x=8+4 | | 1/3*1/5*5/8 | | 5/7*8/9*7/9 | | C+3c-7=29 | | 5/6*1/7*2/9 | | 5y-25=-8y | | 4/9*5/6 | | 40=8/5x | | 1/7*8/9 | | 1804.16=x+0.21x | | 5/7*3/7 | | 8/9*6/7 | | -18x^2+5x+118=0 | | Z+20.25=10.37 | | 5/8*4/9 | | -4-7=5x+7-4x | | 15x-3=30x+7 | | 5(x-3)+8=-7 |