If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
-8*x^9*y^12 = 0
-8*x^9*y^12 = 0
-8*x^9*y^12 = 0
-8*x^9*y^12 = 0 // : -8*y^12
x^9 = 0
x = 0
x in (-oo:0) U (0:+oo)
((-8*x^9*y^12)^-2)/3 = 0
1/192*x^-18*y^-24 = 0 // : 1/192*y^-24
x^-18 = 0
x naleu017Cy do O
x belongs to the empty set
| 6r^3+5r^2+2r=9r^2+4r^3 | | 9s^2+9s-40=0 | | 18x+6=10x+45 | | -2x-7=-7 | | 2r^3-4r^2+2r=0 | | 4w-2(w-1)=-38 | | -20x+6+9x=28 | | -75+7.50x=0 | | h=-4.9t^2+50t+60 | | 16x+4y=21 | | X+17=2x+6 | | 5(2y-1)-3(4y-6)=7 | | 276=-12-8k | | -6+8=-4 | | 3x+5=125 | | 19y+2=9y+22 | | 5r-3r+6=6r-r | | b^2+b-72=0 | | -75+7.50x=150 | | 3-7x+1/3=4-(x+2/3) | | 16t+4(1-5t)= | | 1/2x+3/4=0 | | 2x-7=17x-7 | | 5(3p+12)-4=-3(2p-6) | | 20+6x=2x+28 | | 6x-22=110 | | .23x+8+0.2x=-15 | | 5(3p+12)-4=-3(5p+4) | | 6x=110 | | 4x+28=2x+24+2x+2 | | 75h=255 | | t^6-8=0 |