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^-4*x^12)/(x^6) = 0
x = 0
x^6 = 0
(x^-4*x^12)/(x^6) = 0
(x^-4*x^12)/(x^6) = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x = 0
x = 0
x^6 = 0
x^6 = 0
1*x^6 = 0 // : 1
x^6 = 0
x = 0
x in (-oo:0) U (0:+oo)
((x^-4*x^12)/(x^6))^-2 = 1/625 // - 1/625
((x^-4*x^12)/(x^6))^-2-(1/625) = 0
((x^-4*x^12)/(x^6))^-2-1/625 = 0
1*x^-4 = 1/625 // : 1
x^-4 = 1/625
-4 < 0
1/(x^4) = 1/625 // * x^4
1 = 1/625*x^4 // : 1/625
625 = x^4
x^4 = 625 // ^ 1/4
abs(x) = 5
x = 5 or x = -5
x in { 5, -5 }
| w-5.3=2.76 | | F=fm(fn-1) | | -8(m+14)=56 | | 6(h-92)-2=28 | | 5(1/2 | | 8n+5=6n+5 | | 9y+8=3y-7 | | 1/2(x-3/4)=-5/6 | | 324=6(7x-2) | | 4a-2=-26+a | | 11s-5=9s+7 | | 8x+16-16=-32-16 | | c-3y=27 | | 5a-6=7a+14 | | 1200*x=1500000 | | 3d-6d= | | x-0.75x=9 | | -3j+24=-18 | | 5y^2-16x=0 | | 2j-12-11=3 | | 35a^2-4a-24= | | a^-4b^-2/a^4b^-3 | | X^5/x^25 | | v=f(a+b)solvea | | (x^4-x^3-2x^2+6x-4)= | | (1/2)x-3=5-(4/3)x | | 25y^2-9x^2= | | -2x+2=-2x+3 | | 3y-24=3 | | 2r-6=6 | | u^2-2uv-35v^2= | | 5(2x+3)=6-3(x-3) |