$\left(\csc\left(x\right)+\sin\left(x\right)\right)^2+2\cos\left(x\right)-\left(\sin\left(x\right)+\cot\left(x\right)\right)^2$
$\sqrt{1}849$
$\frac{\cos\left(5x\right)-\cos\left(9x\right)}{\cos\left(5x\right)+\cos\left(9x\right)}$
$4a+5b.6a+2b.$
$\int f^2\cos\left(1-f^3\right)df$
$\left(x-c\right)^2$
$\int8^{-5}dx$
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