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^2 = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
((5*x^3)/(x^2))*x*((3*x^4)/10) = 0
3/2*x^6 = 0 // : 3/2
x^6 = 0
x = 0
x in { 0}
x belongs to the empty set
| =3x^2*7x*8 | | x^2-22x+112= | | 0.375=T-0.125 | | 1/2x-14y=12 | | 0.82x+0.59x=49.05 | | x^2+10x-75= | | 5y=X+9 | | =x+4 | | 1/4y=c | | m-2/2 | | 7x-10=8+5x | | 3(h-2)=15 | | y=2x+3x-14 | | -6x+3=-12 | | 2[k-(2k+8)+3]=2(k+5) | | -0.6+C=0.6 | | 3y-4-5y=y+4+y | | (2+x^10)+(15+6z^10)= | | -15=3w+3 | | 18t^2-42t+98=0 | | X^2+4y^2-32y+28=0 | | 2y+3y+5=0 | | x+3(5x-2)=8-2(x-4) | | tg(2x+30)=0 | | 1/2x-51/2x-10=15 | | 10-4x=6x+12 | | x+13=7y | | -4p=p-5p | | 14-4b=6b-8b | | -12x-5x=4-2x | | -9=2n+7n | | 6t+7=13 |