Originally Posted by

**TKHunny** Ummm... This is quite discouraging. You should not be forgetting algebra or the addition of fractions. These things should be fixed in your head by the time you get to calculus.

You have $\displaystyle \left({t^{2}}-4\right)^{\frac{3}{2}}$ in the second term.

1) Make it look like that, and

2) Make the denominator of the first term the same and add.

I am tempted to make you do algebra drills for a week after seeing this. You MUST get up to speed. Calculus is far more difficult if you are struggling with algebra.