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)
36*x^2-((64*x^2)/(x^2)) = 0
36*x^2-64 = 0
36*x^2 = 64 // : 36
x^2 = 16/9
x^2 = 16/9 // ^ 1/2
abs(x) = 4/3
x = 4/3 or x = -4/3
x in { 4/3, -4/3 }
| 2(n+5)=-35 | | 2x+(x+2)/5=20 | | n+1=3n+7-2n-6 | | 3x-2y=67 | | x^4y^2-64=0 | | 2x+(x+2)/5 | | 1X-0.30X= | | -8+8n=6n+2 | | -3b+11=4-4b | | -3b+11=4-4 | | x+1=1+2x-1-5 | | -6-5=10x+2-9x | | 5(w-7)-8w=-14 | | 9x+6y^2=3 | | 2x-3=4x-x+1 | | v-2+8v=12+7v | | -206=6(1-5m)-2 | | 37=5(u+3)+6u | | 2x+1-1=3x+1-1-x-1-x | | -90=-5(2x+8) | | -16x-20=14x+50 | | 88=8(r+3) | | 7(v-5)-2v=-20 | | 5+9i/7+3i | | -88=-8(x+5) | | 7*x^2-9x+2=0 | | 2w-6w=28 | | -2x-12+8x-20=-3x+12+10 | | 65-n=32 | | 11=5+y/15.36 | | 132x^4+108x^7+60x^3= | | -2.5+8y=23.1 |