1) if f(x)=x and g(x)=3x⁴-1 find fg(x)

2)Find the derivative of s(x) = (1 + x²)⁵

3) Find the derivative of (x) = sin (1 + x²)

4)Find the derivative of y = e^3x+2

5) find the derivative of g(x)=3x⁴-1