book Maths Puzzle Numerical Ability

Would you show me how to simplify the expression: x-(2/x+1)/x-(4x-2/x+1)? Thank you

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book Other Question

how do you divide a + 1 / a^3 + 1 Im not sure what to do.

There are two rectangles. One inside the other. The length of the larger shaded rectangle is 4x+7. The height is 5. The length of the smaller non-shaded