Only answer if you're very good at Math.

What is the sum of 7x/x^2 - 4 and 2/x + 2?

A: 7x + 2/x^2 - 4

B: 9x - 4/x^2 - 4

C: 7x + 2/ x^2 + x - 2

D: 9/x

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