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)
9/(-z) = 1 // - 1
9/(-z)-1 = 0
-9*z^-1 = 1 // : -9
z^-1 = -1/9
-1 < 0
1/(z^1) = -1/9 // * z^1
1 = -1/9*z^1 // : -1/9
-9 = z^1
z = -9
z = -9
| p(6-p)= | | 32=-c/5 | | 15/8+1/3t=6 | | M/8=0 | | M/-15=-10 | | 2(x-6)=28 | | 102-(4x+16)=4(x+8)+x | | 2/5x-4=20 | | 5x+4x+28=0 | | x-18=108 | | 5p+3q=47 | | 30=w/15 | | 4=4(z-6) | | 3c-8+7=-18 | | (3a-4b+6)-(3a+2b+6)= | | C/-4=-64 | | x+-7=-14 | | -24x^5+(3/x)=0 | | 6(x+4)=4x+14 | | (3u-2v+4)-(3v-4u-5)= | | 3y-9+y+35=8y+30-6y | | 10.1=s/-8 | | 17y=2(8y-3) | | 3-3x=4x-(3-7x) | | 4x^2-7x+14=2x+9 | | 16y=15(y+1) | | (3y+2)*(5y+4)=0 | | 1x/2=6 | | (3x-5y+2z-6)-(2x+5y+6z-7)= | | 0.5(-8p+1)=-4p | | at=m | | -14+6+7-2b=+5b |