Real Quick Calculus Help

Hey guys, just looking for confirmation that my answers are correct.
Year 13 Calculus, not sure what grade that is in America etc.
Anyways, here's the questions, Under the topic:

Advanced Polynomial Differentiation:

1) x^1/2(x^3-5)
2) (1) / (2x + 13)^5
3) (7) / 3(x + 1)^10

If you have the time to explain how to do those, It'd be much appreciated.
If you don't feel like posting here, [email protected] is my MSN.

Thanks a lot

 

One second, I'm solving.

 

1) simplifies to x^(3/2)-5x^1/2, derives to 3/2 x^(1/2) -5/2 x^(-1/2)

2) same as (2x+13)^-5, derives to -5(2x+13)^-6 *(2) (chain rule)

3) similar to 2, becomes -70/3 (x+1)^-11

 

I will help you with these, and can explain how it is done as well.

Just contact me on MSN - If I remember correctly you still have me added?

 

Sure do buddy. I'll hopefully find you online tonight after school. Appreciate it mate.

 

I'll help tonight after work, about 10 hours from now.