$\frac{1+tan\left(x\right)}{sin\left(x\right)+cos\left(x\right)}=sec\left(x\right)$
$y=5\left(5^x\right)$
$49c^2+56c+16$
$n^2-40n\:+\:20$
$-4+1+2+2$
$\left(3a+\sqrt{3}\right)\left(3a-\sqrt{3}\right)$
$2^2+7^2$
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