differentiation questions??? :(

HELP PLEASE! there's a time limit to this. it's homework, not a quiz. but i have tried and tried. i'm dead serious. :(

can you guys help?

Differentiate the following function. http://www.webassign.net/cgi-bin/sym...x%29%29%29%5E2

would i foil and then differentiate? because i've tried that over and over.

and then another:

Differentiate. http://www.webassign.net/cgi-bin/sym...%5E%281%2F3%29

(honestly, i don't understand why i can't get THAT one..i get the same answer over and over.... ((32/3)t^1/3) - ((5/6)t^-1/6)...errggggg :(

i'm sorry. i'm not usually a questions person. but i am highly interested in calculus. please help??