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(7x^2 + y^2)^2

(7x^2 + y^2) (7x^2 + y^2)

Now, deliver each.

49x^4 + 7x^2y^2 + 7x^2 y^2 + y^4
49x to the forth power + 14 x to the second power y to the second power + y to the forth power.

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