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)
z+10/z = 6 // - 6
z+10/z-6 = 0
1*z^1+10*z^-1-6*z^0 = 0
(1*z^2-6*z^1+10*z^0)/(z^1) = 0 // * z^2
z^1*(1*z^2-6*z^1+10*z^0) = 0
z^1
z^2-6*z+10 = 0
z^2-6*z+10 = 0
DELTA = (-6)^2-(1*4*10)
DELTA = -4
DELTA < 0
z in { }
z belongs to the empty set
| 42x^2y^3/28x^3y | | 3(2x-1)-4(3x-2)=-5x+10 | | 38=-4x-6(-2x-13) | | (x+3)=(2x-1) | | 12-2(2x+1)=4(x-1) | | 12x-35+18=0 | | -6=b/24 | | 30(5x+10)=5(4x-12) | | 26=9+v | | 5p+12.5=5p+12.5 | | -3/5(5x+10)=1/2(4x-12) | | 4t-9=21-t | | 1+5ln(4x+1)=3 | | 5ln(4x+1)=3 | | C=4.2n+12 | | 5(l-1)=20 | | t/4=-16 | | X+2/-4=12 | | 7x+15=2x+16 | | 5x+11=3x+7 | | x^6*x^4*x^4=x^96 | | 3y-4=27+6 | | 27+-29= | | 4(2x-1)=2x+3+6 | | -3/2+y=-2/3 | | -4(x-5)=13 | | 45-96x+24=-24x-18+24x | | x^2-46x+17=0 | | 5(2x-1)=9x+9 | | 3/10+2/15 | | 8/100=11/x | | 17/3+37/8 |