If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-(((3/(x^2))/3)/x) = 4*x // - 4*x
2*x-(4*x)-(((3/(x^2))/3)/x) = 0
2*x-4*x-x^-3 = 0
-2*x-x^-3 = 0
-x*(x^-4+2) = 0
1*x^-4 = -2 // : 1
x^-4 = -2
-4 < 0
1/(x^4) = -2 // * x^4
1 = -2*x^4 // : -2
-1/2 = x^4
-x = 0
-1*x = 0 // : -1
x = 0
x in { 0}
x belongs to the empty set
| (5000+x)*0.035=x | | 14-2a(a+7)= | | P=x*2-5x | | 5(4s+9)=285 | | -4b+16=80 | | 6b+4a= | | x+x+2x+8+2x+8=106 | | 4(a-5)=56 | | 4x-2/4=2-3x/2 | | (8/15)r=16 | | 84=84 | | 1+3n(x-1)=4 | | 44=17a-17 | | (7/12)s=14 | | 3x/8-3=0 | | 3w+11=6w-4 | | (7/10)n=21 | | 3a+(a+16)=270 | | (5/8)t=12 | | a*(a+4)*(a+8)*(a+12)=585 | | 5y+3=3y+14whatisy | | -30-16=-15 | | 14p+14q+p-4q-4p= | | 4(5)=3(5)+5 | | 3y+(2y-8)-(y+1)=0 | | 15+6x=15-2x | | 25b+15b= | | 5(p+4)=3p-3 | | (x-1)(2x+3)(3x-7)= | | 3-5x/4=8 | | 605=66a+16b | | 5(n+2)=40 |