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)
(-4*x^2)/x = 0
-4*x = 0 // : -4
x = 0
x in { 0}
x belongs to the empty set
| -8x+5y=-2(2-y) | | 10x+10(5x)=3000 | | 6/16=9/24 | | 6/9=9/24 | | 8+4y-6=8y+4-6y | | 10x*2*7/4=70 | | 4(y)(3z)x=12 | | 11x+7=11x-7 | | 4(x+7)+8(x+4)=0 | | 5x+y=292 | | 5x^2-52x+116=0 | | -4=-27y | | 5/(3x-15)*(6x-30)7 | | 8+3lnx=9 | | 7u+20=-6u-6 | | y=[x-(4+6i)][x-(4-6i)] | | s=-16(0)+73+6.5 | | 5/3x-15*6x-30/7 | | arcsin(1/2) | | 3(x+4)=(6x-24) | | s=-16(4)+73+6.5 | | 2x-30=x-6 | | 0.4(x+40)+.4x=32 | | 3-8x/5=-17 | | c=1/2jq | | 3-8x/5-17 | | 3-8x/5=17 | | 3-4/5k=-13 | | 3-4/5k=13 | | 5-0.4x=-5 | | 3(2x-2)=6(x+1) | | 5-0.4x=5 |