exam Maths Puzzle Numerical Ability

Please help to simplify

3i - 2i^2 + 3

DIVIDED BY

the square root of -16 - the square root of -2 times the square root of -2

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Please help me solve this problem thanks,
For a lift truck rental of no more than three days, the charge is $300. An additional charge of $75 is made for each day or portion of da graph the exponential function f(x)=4^x-2