book Maths Puzzle Numerical Ability

please help me with this problem because i donot understand how to do it.
2y(y^+3y-2) you have to multiply then simplify i would greatly apprciate it if you could help me.

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book Other Question

24a-8-10a=-2(4-7a) The sun of two numbers is 64. Twice the lesser number is five more that the greater number. Find the numbers.