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 = 0
u = 0
u = 0
u in (-oo:0) U (0:+oo)
-8 = 3/u-5 // - 3/u-5
5-(3/u)-8 = 0
5-3*u^-1-8 = 0
-3*u^-1 = 3 // : -3
u^-1 = -1
-1 < 0
1/(u^1) = -1 // * u^1
1 = -1*u^1 // : -1
-1 = u^1
u = -1
u = -1
| 39=1-3/10b | | X/4=1.1 | | -3/2y=7/5-5/6x | | x-11/4=3 | | 3x-5+5x+7=90 | | 198x-12x^2=0 | | 7.2x=86.4 | | 3e=7.5 | | (7x-2+12)+(-5x-3x+2)=-4x-(-8x+2) | | N-6=24.2 | | 16y=-4x | | 13.3=1.9x | | 1/4(8x-12)=24 | | 3.5x+2.4y=23.6 | | 2/9(9x-6) | | (4b+6)-(4+b)= | | (X+10)(x+1)=0 | | 4=-7x+3x | | M+2.5=10 | | 10x^2-7x+3= | | A=0.5aP | | 5t^2-5t+550=0 | | 56-24=x | | -16t^2=-63 | | 30x^4-25x^3= | | -2/3a=18 | | (4x)-2(4x)3(4x)=(4x) | | -83=9-2 | | .5x^2+x-2.5=15 | | 0.25x+0.10=-0.6x-0.7 | | 3.5/4.5 | | .03x^2-1.2x+6=0 |