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)
3/8 = 13/y // - 13/y
3/8-(13/y) = 0
3/8-13*y^-1 = 0
-13*y^-1 = -3/8 // : -13
y^-1 = 3/104
-1 < 0
1/(y^1) = 3/104 // * y^1
1 = 3/104*y^1 // : 3/104
104/3 = y^1
y = 104/3
y = 104/3
| 8r=54-r | | 7+(5P-P)=11P | | -28+10X-2= | | 15x+23=-18x+48 | | 2x+1=16-x | | 7(n-2)=5(n+4) | | 2v+18+16=4(v+7) | | 4x+19x+23x=115 | | (3/8y)(4/9) | | 6x+56+2x+28=180 | | 7(x-8)=6(2x-1)+4 | | 2(7x-1)-5x=-(-7x)+4 | | 98+16m=290 | | x^2+y^2-20=x-y-2 | | -2x-8=2x+4 | | 28n-70=322 | | 3x^4+4x^3-x^2+4x-4=0 | | m+7=3m+15 | | 15+9r-2r=1 | | 3m+6.75=32.25 | | Log(8x+20)=2 | | 15x-3x=4x+8 | | 5X+4*(X-2)+7*(X+4)=100 | | 1/3×60 | | 2x^5-11x^3+5x=0 | | x+x+14=39 | | 3/4x=19/4 | | 2(x+57)=6x-3.4 | | X+97=237 | | x+2x-z+7=4x-x+2 | | 8a-9b=0 | | 5x+179+7x+159=180 |