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
8*x = 0
9/64-(9/(8*x)) = 0
x = 0
x = 0
8*x = 0
8*x = 0
8*x = 0 // : 8
x = 0
9/64-(9/(8*x)) = 0
9/64-(9/(8*x)) = 0
(-9/8)*x^-1+9/64 = 0
-9/8*x^-1 = -9/64 // : -9/8
x^-1 = 1/8
-1 < 0
1/(x^1) = 1/8 // * x^1
1 = 1/8*x^1 // : 1/8
8 = x^1
x = 8
x in (-oo:0) U (0:8) U (8:+oo)
(x/64-(1/x))/(9/64-(9/(8*x))) = 0
(x/64-x^-1)/((-9/8)*x^-1+9/64) = 0
(1/64*x-x^-1)/(9/64-9/8*x^-1) = 0
1/64*x-x^-1 = 0
x^-1*(1/64*x^2-1) = 0
1/64*x^2 = 1 // : 1/64
x^2 = 64
x^2 = 64 // ^ 1/2
abs(x) = 8
x = 8 or x = -8
x^-1*(x-8)*(x+8) = 0
(x^-1*(x-8)*(x+8))/(9/64-9/8*x^-1) = 0
( x+8 )
x+8 = 0 // - 8
x = -8
( x-8 )
x-8 = 0 // + 8
x = 8
( x^-1 )
1*x^-1 = 0 // : 1
x^-1 = 0
x należy do O
x in { 8}
x = -8
| x^2-2x-(1/2)=0 | | (3v+8)(4+v)=0 | | 2mx^2-(mx-4x)-2=0 | | 3(2x+5)+2x=7 | | rs=9y-9 | | n-0.5=4/2 | | 4y+3x=734 | | 3x^3y-5xy^3=6 | | 5/6-3/2x=0 | | 9m+7-11=12m-8 | | -24/x-5=-9/x | | 5x/4-1/4=3/8 | | 8i+7=64-7i | | -7(x+8)=-3(x-5) | | 8y+3n=4 | | 3D+8Y=4 | | 4+7b=3(b+8) | | -4(4-4x)=2+7x | | 12p-7=-3p-18 | | 6b+6(b-3)=15+b | | 334+50+x=1.7 | | 3x+6y-z=9 | | -14x-7=21 | | 9e+13= | | (x+4)(x-5+5i)(x+5+5i)=-200 | | 5x-8=-5x+2 | | (x+4)(x-5+5i)(x+5+5i)=0 | | 7(x-1)=x-13 | | -14x-17=21 | | (x+4)(x+5+5i)(x+5-5i)=0 | | 10(g-5)=2(g+9) | | 5x+12=142 |