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)
0.1 = 1/z // - 1/z
0.1-(1/z) = 0
0.1-z^-1 = 0
-1*z^-1 = -0.1 // : -1
z^-1 = 0.1
-1 < 0
1/(z^1) = 0.1 // * z^1
1 = 0.1*z^1 // : 0.1
10 = z^1
z = 10
z = 10
| -6(3n-2)=4(-4-2n) | | 8.3+2x=18.8 | | n+19=221 | | -6(3b-2)=4(-4-2n) | | 10x-3-2x=-4 | | 6c-3/3c^2-12 | | (h/5)^2 | | 6(x+3)+x=4(x+2)-4 | | h/5^2 | | 2(x+4)+x^2=x(x+2)+8 | | 3x/4=20 | | 2a+3b=81 | | -3+8x=-34 | | 64w^2-1=0 | | 3x-8=8+16 | | (6x-27)= | | -5u+20+2=11-u+3 | | 7y-(9y-3)+4y=0 | | 2t^3-6t+8=0 | | 1.47=x^5 | | 4x-12=47 | | 10x-3-2x=-34 | | -48+38= | | 13w+18w-7+6=-3w+6-7 | | -3(u+3)+4u= | | 13a+13b+2c+5c-2b-6a= | | 5b^2-20=o | | -10.9q+1.6=-81.2-1.7q | | 4cos^4(x)-1=0 | | F(x)=x(x+4)(x-8) | | 6(4y+7)=62 | | (-15x^2)+45x+10=40 |