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^4 = 0
x^4 = 0
x^4 = 0
1*x^4 = 0 // : 1
x^4 = 0
x = 0
x in (-oo:0) U (0:+oo)
(X^6)/(x^4) = 0
X^6*x^-4 = 0 // : X^6
x^-4 = 0
x należy do O
x belongs to the empty set
| 9p+5.8=8 | | -4(4+n)+2=-2-6n | | 167=6+14-49r | | -2(9m-4)-1=27+10m | | 40p^2+68p+24=0 | | p-2q-r= | | -4v+6v=-6 | | -3(5n-4)-2=30-5n | | -4v+6v=6 | | 36x-2x=-x+2 | | x2/3-2x1/3-3=0 | | 10+2r=-3(6-3r) | | 3/4(3/2p-4) | | x-27=108 | | -15v-40=23-16v | | -m-6m=0 | | x^2-96x-576=0 | | 3d=8 | | x=8pi-3pi | | Q/7=0 | | 7x+6y=-135 | | x+2=3x-40 | | (3v+7)(1+v)=0 | | -12+6x=3+5(x-2) | | (1/3)x-4(5/6) | | 9q+2=-16 | | 12=2/7x | | 3x-2/4=-2 | | 3n^3-24n^2=0 | | 3-2+-5b=-11 | | p-2q-r=1 | | (D-8)/-2=12 |