exam Maths Puzzle Numerical Ability

can i get help simplifing this expression

(2x+y)+(x-y)

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exam Other Question

???Multiply the square root of 361 by the 4th root of 625. Can you please break down by step? Along the the bottom 2 questions?

What is the 3rd root of 64x13y3 and what is the 4th root of 4,096x4y10? Solve the equation. √96 / x√23 = 1/2
If you could put down all the steps I would appreciate it!!!!