exam Maths Puzzle Numerical Ability

Sorry I submitted this question wrong the last time. One little mistake makes all the difference.

3/x^2+4x+3 - 1/x^2-9

Sorry for the mistake! I appreciate your help!
ac

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exam Other Question

15(e)3x = 25................(E)3x = 5/3


cos(3x) = 5(x)2 (x squared)
Simplify each problem before you multiply.
3x+6/5x*x+4/x^2+2x=