If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
4 = 36/y // - 36/y
4-(36/y) = 0
4-36*y^-1 = 0
-36*y^-1 = -4 // : -36
y^-1 = 1/9
-1 < 0
1/(y^1) = 1/9 // * y^1
1 = 1/9*y^1 // : 1/9
9 = y^1
y = 9
y = 9
| 8-(5y+3)=5v-5 | | 6=84/x | | 12(3m+5)=-6(4m+24) | | 5.9[e+2]=1.5e+16.2 | | 12x^2-150=0 | | 5*(10-M)=N-10 | | 9x+4=3x-.75 | | 45k+35= | | 24x-7-14x+2=21x-9-11x+12 | | -x-8=-10x-89 | | .66*9a+.66*6=27.4 | | 16.38=3g+3.54 | | 6x^2-243=0 | | 3(7x-1)=-108 | | 1.22g-5=.49 | | (2x+33)+(5x-15)=90 | | x/6-9=3 | | 1/4x-1=-13 | | Y=[5-4]*3 | | P-1/3=-5/8 | | (w-.4)(-.7)=-4/5 | | 7a^2+3n=7-40a | | 5/6d-1/2=1/9 | | 4x+-3x=0 | | 18x+27-42x-12=-81 | | x:1/2-2/3=5 | | 2x+47=9x+33 | | y-5=1(x-7) | | .3x-4.6=2.5 | | x/12=13/7 | | -3n(n-2)-(8+2n)=-6n | | 426+37+384= |