1). Find dy/dx for y=cos2(sin 2x)

2). The number of gallons of gasoline in a tank t minutes after it begins to leak is
g = 2 * (15-t)2, how long does it take to reach its highest point?

3). Find the anti-derivitive of y= 5x^8+2y^4.

4). Find dy/dx for sin(xy)=2x+5.

5). Find f(k) = k^x + x^k