If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
(4*t^-3)/(x^3) = 0
x^3 = 0
(4*t^-3)/(x^3) = 0
(4*t^-3)/(x^3) = 0
4*t^-3*x^-3 = 0 // : 4*t^-3
x^-3 = 0
x należy do O
x^3 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x in (-oo:0) U (0:+oo)
((4*t^-3)/(x^3))^-3 = 0
1/64*t^9*x^9 = 0 // : 1/64*t^9
x^9 = 0
x = 0
x in { 0}
x belongs to the empty set
| 2x+50=1279 | | 16x^2-y^2+16y-128=0 | | x-(x*.40)=75000 | | -1/4y=18 | | 12y+48x=0 | | 0.6(0.6+2x)=1.5x | | 10-5=-6x+8 | | 8w+14=15w | | -16=-20+n | | (x*x)+9x+14=0 | | -6=4(x+8)+6x | | 5x^2-60x-90=0 | | 2u=15-3u | | 9-5p=-7 | | 2(x*x)+6x=0 | | 4w(2w+8)-7(2w+8)=0 | | (-5)(20+x)= | | 5x^2-60x-900=0 | | 12-4b=-20 | | (y^2-6)(9y^2-9y+8)= | | (3y-6)/2y=17/3 | | 60=90-2.5x-7.5 | | 6e-19=14e | | (20)(5x+5)=(7x)(5x+5) | | 4=5/9(f-32) | | 2(3x+4)+34=7x | | 8.9x+1-5.9x=7 | | (4x)(6x-20)=(5x)(4x+8) | | 7x+30=5x+50 | | 8/11x=4/11 | | 7(x-2.4)=4.9 | | 0.5+1=7+4.5s |