I have the following exponential equation

(x^3 + 2)(x^2 + X)

Find the equation of the tangent line when x=1

This is what I do to get the derivative

(3x^2)(x^2 + x) + (2x + 1)(x^3 + 2)

When I factor this out I get an answer that includes x^4 and x^3 and x^2 yet the answer for the equation of the line is 15x-9.

Where am I going wrong? I am really lost on tangent line equations.