If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( t )
t^2 = 0
t = 0
1-(64/(t^2)) = 0
t^2 = 0
t^2 = 0
1*t^2 = 0 // : 1
t^2 = 0
t = 0
t = 0
t = 0
1-(64/(t^2)) = 0
1-(64/(t^2)) = 0
1-64*t^-2 = 0
-64*t^-2 = -1 // : -64
t^-2 = 1/64
-2 < 0
1/(t^2) = 1/64 // * t^2
1 = 1/64*t^2 // : 1/64
64 = t^2
t^2 = 64 // ^ 1/2
abs(t) = 8
t = 8 or t = -8
t in (-oo:-8) U (-8:0) U (0:8) U (8:+oo)
(8/t+1)/(1-(64/(t^2))) = 0
(8/t+1)/(1-64*t^-2) = 0
(8*t^-1+1)/(1-64*t^-2) = 0
8*t^-1 = -1 // : 8
t^-1 = -1/8
-1 < 0
1/(t^1) = -1/8 // * t^1
1 = -1/8*t^1 // : -1/8
-8 = t^1
t = -8
t in { -8}
t belongs to the empty set
| 3/4x+1/8(x-5)=1/4 | | -10-4y=34 | | 3/2-2/7=x/14 | | -2x-5=-1 | | n/9+4=58 | | 2x^2=x^2+25 | | 2.5x+67=92 | | -2/45p=7/25 | | 6a-30= | | cos(3x/2) | | 1.7+0.2x=3.3 | | x/1-9=-4 | | -4x+2x=-8 | | 1.7=3.3-0.2x | | 121/4-83/10 | | 5-3x=-22 | | (4x-1)/(2x^2+3) | | 14x+36=184 | | 112-u=159 | | y=.03x^2+1.8x+4 | | -0.5x^2+x-24=0 | | 5=-10/-2 | | 6x-11=23 | | -0.5X^2-40x+384=0 | | 5=-3/-2 | | (2x^2+3)/(4x-1) | | 2-3=x+2 | | 9y-5=15y-7 | | -2x+(-6)=4 | | 4(u+9)=6u+40 | | w/5+17=3 | | 3x+(4x-1)+105+(5x+4)=360 |