exam Maths Puzzle Numerical Ability

please walk me through the process for solving this

(x2 + 5x +4 / x3y2)(x2y3/2 +2x + 1)

Thank you.

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exam Other Question

give the first four terms of the geometric sequance in which a1=6 and r=4.
thanks i hope you can help! Suppose we wish to mix some 32% salt solution with some 58% salt solution to produce ten liters of 46.3% salt solution. How many liters of each of the starting solutions needs to be used?