If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
18*u^6*x^7-(((13*u*x^7)/(-2))*u^2*x^4) = 0
18*u^6*x^7+(13/2)*u^3*x^11 = 0
18*u^6*x^7+13/2*u^3*x^11 = 0
u^3*x^7*(18*u^3+13/2*x^4) = 0
13/2*x^4 = -(18*u^3) // : 13/2
x^4 = -36/13*u^3
x^4 = -36/13*u^3 // ^ 1/4
abs(x) = (-36/13)^(1/4)*u^(3/4)
x = (-36/13)^(1/4)*u^(3/4) or x = -((-36/13)^(1/4)*u^(3/4))
u^3*x^7 = 0
u^3*x^7 = 0 // : u^3
x^7 = 0
x = 0
x in { (-36/13)^(1/4)*u^(3/4), -((-36/13)^(1/4)*u^(3/4)), 0 }
| 7(5x+10)=-25(x-3) | | 10=5+w | | 6+(-30)= | | 14+12x=3(24x+21)-x | | 2X+14Y=5632 | | 8x+5=8x-1o | | .5w+.8-1.2w=.16-.15w | | 13=h+10 | | 13x-(15x)= | | 2+3x=(-6x)+10 | | 240.00+.15a=337.50 | | q-11=6r | | 9+d=17 | | -5w/8=-9 | | 5x-3x-15=-7+4x+12 | | 28=v+11 | | -3+7x=5(17x+9)+x | | -5w/8=_9 | | 8+4x=3(7x+9)+x | | 3(10x+18)=-26(x-3) | | (100)(0.22)(180-X)=(200)(X-10)+152(X-10) | | A=-3n+2n | | 2(a+5)-3(a+4)=3 | | 6-(8b)/(4)=-4 | | f(-3)=3x+4 | | 20-16p=4(5-49) | | 5x-1=26-4x | | x^2/100/x | | 6(5x+4)+2=26 | | v-1=3v/8 | | kx-x^2/100 | | 7-x=(-5) |