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)
x^5*((16*x^-2*y^-6)/125)*y^4 = 0
16/125*x^3*y^-2 = 0 // : 16/125*y^-2
x^3 = 0
x = 0
x in { 0}
x belongs to the empty set
| 2(3x+6)=x-1+7x | | 2(3x+6)=x-1+3x | | d-14=-6 | | 7c-6=8 | | 0x+2y=5 | | 20a=q | | 22/9x+32 | | 3(3x+6)=x-1+3x | | -3+13y+6=14+15y-17 | | 8a-(3-a)=5a-11 | | -2z+5=-11 | | 10x-55=4x+119 | | 3x+6=x-1+3x | | 17+x=48 | | 3x+6-1=x-1+3x | | x^3-2x+4=24.8 | | 3x+6-1=x-1 | | m-37=6(3+2m) | | -1-m=-2 | | 45(15)+200=x | | c=38.56+0.25x | | 4x+31x-6=7(5x+9) | | -12=6.4+m | | 600m+.05=900m+.01 | | 48+(5x+2)=180 | | x/7-3 | | -34-11x=20-8x | | 6g-3=15g | | 5x+4=-8+3+16 | | w-2a=nw | | 5n+6=7n-2 | | 0=5.75+0.89m |