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Mathematics
OpenStudy (anonymous):

(2n+1)(2n+1)!=?

OpenStudy (schrodinger):

Just use FOIL. You know what FOIL is, may I ask?

OpenStudy (kinggeorge):

Is that exclamation mark you used a factorial?

OpenStudy (anonymous):

simplified it's 2^n* (2n+1)^2*n!

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