$\int4\cos\left(3x\right)\sin^4\left(3x\right)dx$
$\left(9a-4\right)\left(9a+4\right)$
$2x+6>x-12$
$\frac{\sin\left(x\right)+\cos\left(x\right)}{\sec\left(x\right)+\csc\left(x\right)}=\frac{\sin\left(2x\right)}{2}$
$\frac{2^{16}}{4^6}$
$\lim_{x\to0}\left(\frac{n^2}{2^n}\right)$
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