i have some questions need its solution

Use product rule to find the derivative of f(x) = (x2 + 5cosx) (23 - 2x + tanx). Find an equation for the line tangent to given curve y = =10:1-3 atm = 0). Ar+1 If g' (4) = 4 and h'(4) = -1, find f'(4) for f (x) = 5g(x) + 3h(x) + 2. Find all values of x (if any) where the tangent line to the graph of f (x) = a" - 12x + 2 are parallel to the line y = 3. Find the derivative of y = cote 2x-5