book Maths Puzzle Numerical Ability

Find the exponential form of - 1 - i.

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book Other Question

how would you solve a problem like -x(3/7+y) Can you help?

4^-1x^2y^-3/6^-1x^-1y^2 simplify

I got 3x^3/2y^5 or 1x^3/2y^5

How far off am I?