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)/x-3 = -1/x // + -1/x
(2*x)/x-(-1/x)-3 = 0
x^-1+(2*x)/x-3 = 0
1*x^-1 = 1 // : 1
x^-1 = 1
-1 < 0
1/(x^1) = 1 // * x^1
1 = 1*x^1 // : 1
1 = x^1
x = 1
x = 1
| 3x-88=180 | | 3r-r=4 | | 8y=2y+4 | | 2y-12=10x | | 3x+88=180 | | 2(4p-7)-12= | | -m-2-8m=-20 | | 5(7x+14)=1.4-(x+2) | | -5p-7-p=-19 | | -62/20 | | Y+17=5x | | 3x-7(9-x)=6 | | 4y-20x-48=0 | | 8x-3y=53 | | 3+5r+6=19 | | 4x^4+64x^3+60x^2=0 | | X/23=15/3 | | 3*ln*(5*x+1)=9.3 | | 5y=-10x-15 | | x^3+43x+6=0 | | 9/15=117/x | | -10=1/2x-3 | | 8^(7/3) | | 5/8w=25.5 | | 10=x^9 | | -v-3v=-8 | | 4x-19=38 | | -14+2x=-34 | | x*48/2=144 | | (4y+1)(y+1)(4y)=(6y^2-4y)(3y)(h) | | 4y+20x=48 | | 12+2x+x+3=90 |