book Maths Puzzle Numerical Ability

what is the answer to e^[(pi*sqrt(-1))+1]
and e^[(pi*sqrt(-1))-1]

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book Other Question

example...

2x>0

when you graph the equation and x isnt greater than 0...where do i shade?

the shading confuses me. please help!!!
please simplfy this
(4x^3-6x^2+5)-(x^2+7x^2-8x-2)