Originally Posted by

**john84** I find myself sitting at my desk, pondering why I decided to take Calc 2. Anyway, I'm having trouble with simple integration by substitution, which does not bode well for the rest of my semester.

Find the Following Integral: t^3(t^4-2)^5dt

So far I have done

u=t^4-2

du=4t^3dt

So i have ∫(u)^5(du/4)dt=1/4 ∫(t^4-2)^5*4t^3dt

simplifying...

1/4((t^4-2)^6)/6*t^4

Giving me a final (wrong) answer of

((t^4-2)^6*t^4)/24

What am I doing wrong here? Any help is extremely appreciated

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