exam Maths Puzzle Numerical Ability

Solve the following please:

2/a+3 - 3/2a+6 + a+2/a^2+6a+9 =?

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exam Other Question

I sent four questions yesterday, but I have not received a response. I could really use some help on this one. For the function f(x) = x� - 3x + 4 construct and simplify the difference quotient f(x) = [f(x+h) - f(x)]/h