If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
(5/2)*x = 0
(5/2)*x = 0
(5/2)*x = 0
5/2*x = 0 // : 5/2
x = 0
x in (-oo:0) U (0:+oo)
(((5/2)*x)^-6)/7 = 0
64/109375*x^-6 = 0 // : 64/109375
x^-6 = 0
x naleu017Cy do O
x belongs to the empty set
| 256*25/4 | | .05n+.10d=8.50 | | 100*25/4 | | y=-1.2x+5.6 | | .05n+.10=8.50 | | 5/(2x^-6/7) | | 100/25*4/25 | | 3x+33/5+x+52/7=17 | | 100*4/25 | | -1/3x+2=12 | | 8x^2+8x^2= | | 4(x-4)+56=-4x | | -Y+11=6Y+18 | | y=0.10(700)+23.25 | | -8.4=1.2x | | 2x-3=b | | 3V-16=5V | | -9(-6w-3v+5)= | | 1/2(2x+8)=16 | | 2Z-36=8Z | | 2x^2+12x+24=0 | | x/8=41/2 | | 8(x-5)= | | 65x+89f-12g=208 | | 0=8T+17 | | 65x+89f-12g= | | 1/2(2+8)=16 | | 7U+23=0 | | 2(y-1)=5(y-4) | | 4+9f=122 | | 3*x+5=x+19 | | 4+9f=1123 |