Hello Community. I could use some help on these calculus problems (Derivitiv). Thanks

1.differentiate the function using the quotient rule.

fx=cos(5x)/x^4

2.fx=(x+3)/(x-2). Derivitive?

3.

http://www.webassign.net/cgi-bin/sym...%28x%2B7%29%29Derivitive?

4.

http://www.webassign.net/cgi-bin/sym...5%20csc%28s%29derivitive?

5.

http://www.webassign.net/cgi-bin/sym...%2A%2A2%2B2%29derivitive

6.Find the second derivative of the function.

*f*(*x*) = 2*x* + 25*x*−2

7.Find *f* '''(*x*).

http://www.webassign.net/cgi-bin/sym...0%3D%202-6%2Fx