exam Maths Puzzle Numerical Ability

I am having a serious problem figuring out this problem. Can someone please help me?
The problem is multiply (4b+1/2)(8b-3/4)

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exam Other Question

Please help 2x^2-2y^2 over3x^2 y^2 multiplied by 4x^2 y-4xy^2 over 6x^2+6xy

2x^2-2y^2.....4x^2 y-4xy^2
---------..X..------------
3x^2 y^2......6x^2+6xy

dots were used to Simplify: y(squared)+y-20/y(squared)-2y-8. Assume that the denominator is not equal to 0.