exam Maths Puzzle Numerical Ability

Please help.
Find the area under the normal distribution curve to the right of z=-1.03

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exam Other Question

please help me sovle this equation (3+5x^3+2x)-(x+2x^2+4x^3) (6x/x-y) - (3y/y-x) + (5/x^2-y^2)
Please simplify. I have reduced to (6x^2+9xy+3y^2+5)/[(x-y)(x+y)]. I think you can break down further, but not sure.

If a separate into to f