If it's not what You are looking for type in the equation solver your own equation and let us solve it.
U in (-oo:+oo)
(U^3)/8 = 0
1/8*U^3 = 0 // : 1/8
U^3 = 0
U = 0
U = 0
| -7u^2+23u-6=0 | | 0.5=x^3 | | -2v^2-9v-10=0 | | 12-4x/x-3 | | -1/2*7 | | -3=3w+6 | | -s=-4x-8y+17-3x-9y-11 | | 7/2w=28 | | 9x-4(2-2x)=6 | | a^4b+a^2+b^3=0 | | -v^2+4v+12=0 | | 96/(-4) | | 96/(-4)= | | (4x^4)(2x)= | | -2*28= | | -7y^2+17y-6=0 | | 3x+y=2493 | | -(2/5)2 | | 5xc+2xc=63 | | =(4x)*(7-x) | | 1+7=-3b | | y=3(5)-18 | | =(4x)(7-x) | | 2.1x-8.1=3.15-5.4 | | -28=5c+6 | | -7=-7w+4(w+5) | | y^2-2*y+2500=0 | | y^2-2y-2500=0 | | 4x+3(3x-18)=11 | | x1/2=1/3 | | 5(x-3y)=19 | | y^2-2y+2500=0 |