a) Find the derivative, but do not simplify your answer. y = (7x6 5x4 + 2x2 1)(4x9 + 3x7 5x2 + 5x)

b) For the function

y = (x² + 2)(x³ 9x), at (3, 0) find the following:

(a2) the slope of the tangent line (b2) the instantaneous rate of change of the function

c) Find the derivative and simplify.

y = (6x + 5)(x² 3x).