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 = 0
x = 0
x in (-oo:0) U (0:+oo)
(49*x^3)/x = 0
49*x^2 = 0 // : 49
x^2 = 0
x = 0
x in { 0}
x belongs to the empty set
| y=(3/8)(-8/1)-5 | | -3(m-8)=4m-4 | | 19+15x=334 | | 9m+15=3 | | 9+(7+y)=(9+7)+y | | 4g^2-12g-40=0 | | y/3(3y-4x-6) | | 3.n=5 | | 2x-8=80 | | 5-13p=304 | | 12/45=8/x | | 2u-7=5(3-u)-1 | | (3x^2y^-1/y^3)^2 | | 9x+6=-39 | | 18/2/3 | | 3n+2=65 | | 3x+2y+7z=15 | | X+8.25=24.35 | | n+18/3=-7 | | 6x(x-1)=1-x | | -4v-7(8v+2)=-494 | | y=(3/8)-8-5 | | 5(4x-5)=15 | | x/14+8=9 | | 29g(0)(-15)= | | 1/4m=-39 | | 2x+5y-3z=-5 | | -16+x/5=-13 | | 4x+8/5=-x | | W+22=2(3w-4)+2w | | 1/4m=m39 | | 15c+30=105 |