Please Help Me Double Check if I have Done These Calculus Probs Correctly??

Hello my dear lovely fellow math help forum users!!

Can you please check if I have done these Calculus problems correctly or not? I have taken a picture of the problems with my work in writing. You can enlarge the image with this link: http://img62.imageshack.us/img62/323/123niz.jpg

Please reply if you notice where I have made a mistake... Thanks guys, Much Love (Nod)

http://img62.imageshack.us/img62/323/123niz.jpg

http://img265.imageshack.us/i/0531000105.jpg/