If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( z )
z = 0
z = 0
z = 0
z in (-oo:0) U (0:+oo)
4/3 = 3/z // - 3/z
4/3-(3/z) = 0
4/3-3*z^-1 = 0
-3*z^-1 = -4/3 // : -3
z^-1 = 4/9
-1 < 0
1/(z^1) = 4/9 // * z^1
1 = 4/9*z^1 // : 4/9
9/4 = z^1
z = 9/4
z = 9/4
| Y^4-y^2-3/4=0 | | C+2c-5-5c=9 | | -5+9=15x-2-14x | | 160.67=2000r(8) | | (2x-2)(3x+10)= | | 160.67=2000(8) | | p(x)=30x | | 6x-12x=42 | | y-1=3(x+1) | | (2x-2)(3x+10)=x | | 2x-3=3y+1 | | 60+x+82=180 | | 9y+12=-12+6y | | -2.5x=29.75 | | H=-16t^2+55t | | 1/16-3/4 | | 20w-10=8y+6 | | y+5=5y+29 | | 4x+-12=12+2x | | 2x^3-2x^2=12x | | 8t=9t | | 5x+4x+3=180 | | 19=3p-8 | | r^3+r-10=0 | | 0.48x=48 | | 50c+60=470 | | r^3+r-19=0 | | y=7/3x | | 25h-175=1000 | | x+(x+8.8)=727.2 | | -7/8x=-9 | | 0=5n^2-13294 |