$\frac{\sec a}{\csc a}=\tan a$
$\int_0^{3\pi}\sin\left(\frac{\pi}{2}x\right)dx$
$22=2p$
$6a^2b^3c+4ab^2c^3-2a^2c^2+\:a^2b^2c^2$
$\left(2x-1\right)\left(4x+3\right)^3\left(x-1\right)^2$
$\tan x-0.5362=0$
$4^3.4^{-5}.4^{-2}$
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