If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x^4 = 0
2*x^4 = 0
2*x^4 = 0
2*x^4 = 0 // : 2
x^4 = 0
x = 0
x in (-oo:0) U (0:+oo)
(4*x^6)/(2*x^4) = 0
2*x^2 = 0 // : 2
x^2 = 0
x = 0
x in { 0}
x belongs to the empty set
| 3=x-3-4x | | 4s+3t+5= | | F(1)=4 | | 4^x(1/2)^6x=2 | | 3(533.3-0.66y)+2y=1600 | | -3q+-15q=18 | | 8x+11y=-4 | | 18u-15u=18 | | -9+18x+16x=-5-45 | | 0.33[m+21]+0.75m=-2 | | 10u-6u=16 | | -27=3/5x | | 14u=13u+11 | | 3(3x-2)=-2(8-2x) | | 9m-6m=15 | | 7x+27=x+45 | | 6=6q | | 24d-21d=3 | | 13z-6=9z+18 | | 5y-4y=15 | | -.8m+2.4m-n= | | 10u+12=12u | | 6=x+3y | | 10c+16=18c | | 8-2x=50 | | 4j-6j=10 | | b+0.17b= | | 9-k+5= | | 17w-18=14w | | 5x+10=x-30 | | v+18=2v | | 8n-4+2n+7= |