exam Maths Puzzle Numerical Ability

I NEED HELP WITH THIS PROBLEM PLEASE! 2(X+8)+1/2(2X+4)+75=13(X-4)+150

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exam Other Question

Factor, -12x^3+36x^2 f(x)=2x + 1 and g(x)=2x(squared) + x
Determine the following:

#13 (f of g)(2)