Answer:
x(7y + 2xt)
Explanation:
5xy - x²t + 2xy + 3²t =
= 7xy + 2x²t
= x(7y + 2xt)
2x^2t + 7xy
I'm guessing you want this simplified, since you have not specified what to do,
5xy + 2xy = 7xy
-x^2t + 3x^2t = 2x^2t
= 2x^2t + 7xy
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