exam Maths Puzzle Numerical Ability

how would i do this? Combine the following fractions by addition or subtraction as directed

3 over a+2 + 4 over 2-a - 6 over asq. - 4

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exam Other Question

the circumference of a circle is 6 pie meters. find the radius of the circle Can you answer this problem for me? It is so long, and I just keep getting stuck. It has to do with the trigonometric identities. The instructions are to verify the identity. Here