If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( u )
u-6 = 0
u-6 = 0
u-6 = 0
u-6 = 0 // + 6
u = 6
u in (-oo:6) U (6:+oo)
7 = 1/(u-6) // - 1/(u-6)
7-(1/(u-6)) = 0
7-(u-6)^-1 = 0
7-1/(u-6) = 0
(7*(u-6))/(u-6)-1/(u-6) = 0
7*(u-6)-1 = 0
7*u-43 = 0
(7*u-43)/(u-6) = 0
(7*u-43)/(u-6) = 0 // * u-6
7*u-43 = 0
7*u-43 = 0 // + 43
7*u = 43 // : 7
u = 43/7
u = 43/7
| 2b+16=-24 | | X-1/4x=8 | | (3*4)+2= | | P+.055p=5.96 | | 4x(x+2)-9=2x-8 | | p+.15p=29.50 | | 2/5x=1/2x-1.8 | | ln(x+8)+ln(4)=2lnx | | (11-x)-5=2 | | X+15=19-45 | | 8x-5=6x+8 | | 4x-3=7x+8 | | cos^2(3x)-3sin(3x)=3 | | 17+0=17 | | 9x-3x=4x-48 | | 18-x=x+8 | | 21=y+x | | 2(x-4)=6-(3x-6) | | 7x+(xy)=163 | | 6a-1.1=ab | | 2a+5b=2.5 | | 2a-5b=2.5 | | 7-80=2x+4X-50 | | 2/3(6x-3)-(2x-7)=1 | | 4*28x= | | (6+5y)(9-4y)= | | 940/35 | | 11=(0.20)w | | 7b-5b^4= | | 1+x=-3.5 | | x^4+2x-180=0 | | -3t+(7t-7)=-11+2t |