$\cos\left(53\right).\cos\left(37\right)+\sin\left(53\right).\sin\left(37\right)$
$16n^2+16n+4$
$-\:\left(\:+\:5\right)\:+\:1\:+\:\left(\:-\:5\right)\:=\:$
$12+\left(4-\left(-15-\left(1+2\right)-10\right)\right)$
$y\cdot y^7$
$-4y<12$
$\int x^3\sqrt{x^2+11}dx$
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