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
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-(2/x) = 0
2*x-2*x^-1 = 0
2*x^1-2*x^-1 = 0
(2*x^2-2*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-2*x^0) = 0
x^1
2*x^2-2 = 0
2*x^2-2 = 0
DELTA = 0^2-(-2*2*4)
DELTA = 16
DELTA > 0
x = (16^(1/2)+0)/(2*2) or x = (0-16^(1/2))/(2*2)
x = 1 or x = -1
x in { -1, 1}
x in { -1, 1 }
| 9x+4y=-12 | | (12+14i)-(-9-14i)= | | X-12/4=1 | | (2x+12)+(2x+31)=90 | | -2(v+2)=-2v+1 | | 6(4s+9)=246 | | 4a=a+4 | | 5(2l+1)=85 | | 10m-19=21 | | 15(z+3)-4(1+p)= | | 4m^2-15m-54=0 | | 2(a-10)=-2 | | U/6=84 | | kx^2+4x-6=0 | | 5v=6-10v | | 2b-5=8b+11 | | 3.3+0.25x=0 | | (5/x)-(3/2x)=(x/2) | | 2=x-3/3 | | 2y^2-28y+96=0 | | x=15y+10 | | 2p-2-4p=6 | | x+100=2x-300 | | c=2A-1+10xA-1 | | 9=3/8y | | 10x-3(7)-81=0 | | (9x^4+3x^3-2)+(7x^2-8x+9)= | | -4(2-y)+3y=3 | | 4z/7-6=9 | | Xx+15=8 | | 2x^3-13x=0 | | 1t*t+t+1=0 |