If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
6*x = 0
6*x = 0
6*x = 0
6*x = 0 // : 6
x = 0
x in (-oo:0) U (0:+oo)
1/(6*x) = 4/15 // - 4/15
1/(6*x)-(4/15) = 0
1/(6*x)-4/15 = 0
1/6*x^-1 = 4/15 // : 1/6
x^-1 = 8/5
-1 < 0
1/(x^1) = 8/5 // * x^1
1 = 8/5*x^1 // : 8/5
5/8 = x^1
x = 5/8
x = 5/8
| -3x^2+6x+6= | | 5x=-3x^2-1 | | 8/11=3/(2y) | | 9u=72+u | | -19u+-10u+18u+-7u+8u=20 | | 6-3[4-(7x-2)]=0 | | R/153 | | -8-8k=-1+7k | | y-6/7=-4/5 | | 5x+4x-3x-5=7 | | n+(n+1)(n+2)=14 | | 9-8x-5-6x=6 | | xy-9z=4 | | 3x+25=5x+60 | | x+x+3+81=180 | | -8(1-k)=-1+7k | | 2*x/2 | | -5+5m+5=-5 | | -5p+6+6p=9 | | 23-3x=15-5x | | 9(2380+w)=21915 | | 4-3x=5(x-12) | | 10w+-3w+-w=-6 | | 2x+9-4x+10-7x+xy-11= | | 11/5.43/8 | | 9x+4=3x-8-7x+2 | | ab+2a+10b+20= | | 9x-4=3x+8-7x+2 | | Z-2=50 | | 11/5x43/8 | | 9x-4=3x-8+7x+2 | | Y=x^4-4x^2-3x |