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 in <0:+oo)
(6*r^3*x^3.14*x^4)/3 = 0
2*r^3*x^7.14 = 0 // : 2*r^3
x^7.14 = 0
x = 0
x = 0
| 100-49r^2= | | 0.4m+0.8(4)=0.5(m+4) | | 6=-2d+10 | | 643.14r3/3 | | 21=87-3 | | x^3=150 | | 36+25= | | 175000.00+550.00b=35000.00+1680b | | -17x-5x= | | (2w+2)(w)=24 | | m+6=16.5 | | 56m-m=8 | | 2x^2+1x-28=0 | | 0=-3-(-4) | | 4h^2+28h+49= | | 0=-26-25 | | 9-(+3-5+7-6)= | | 7z-z=-2+2z-1-5 | | 3x2/9x5 | | 0=-3(y+2)+y | | 3x^2-12x-495=0 | | 17x-7=14x-13 | | (2x-11)(2x+1)=0 | | 6.9x-5+x-1.2= | | 6.7x-4+x-1.6= | | 4.n=8 | | (2x+3)(x-7)=4x+6 | | -r^2=64-16r | | 6y-7x=18 | | x-20=20x/3 | | 6x+7y=-25 | | -7y+6x=18 |