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)
x = 2-(8/x) // - 2-(8/x)
x+8/x-2 = 0
1*x^1+8*x^-1-2*x^0 = 0
(1*x^2-2*x^1+8*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2-2*x^1+8*x^0) = 0
x^1
x^2-2*x+8 = 0
x^2-2*x+8 = 0
DELTA = (-2)^2-(1*4*8)
DELTA = -28
DELTA < 0
x in { }
x belongs to the empty set
| 3x^2=-77+18x | | 8-8x=8+x+4-8x | | -k=9k-10 | | 40r^2-3yt+24ry-5rt=0 | | 126x+292y=20150 | | -6m-1=24 | | 3h-18/9 | | -2a+8+a+(-3)=2+(-2a)+(-a)+3 | | 416=x-7(-3x-32) | | -3/4k+2=10 | | 5x=(-45) | | 0.4y=50 | | 48m+36=6(3m-19) | | 4x+6.25=44.25 | | -6m+1=24 | | h+h=27872 | | 238x=30 | | 2ydx-2xdy=-ydx | | 6+2x=3x-2 | | 120=6.35x-18.75 | | 3(4k-8)=12 | | 7.5*6= | | 2x+5+3x=-2x+12 | | 12-4n=8 | | -0.57x+0.42=1.57 | | -3x+-13.8+25=19 | | 20/2.50 | | g(x)=-2x^3-5 | | 4x-3(x-2)=11 | | 5y-3y+4=2y+4 | | 0.25/59.50x=30.00 | | (9x-3)=360 |