$\left(1-5\cos\left(2x\right)\right)$
$-19\:+\:-1\:+\:11\:+\:-12\:=\:$
$\int5-\left(x+1\right)dx$
$\log_{\sqrt{2}-1}\left(\sqrt{2}-1\right)$
$\frac{1}{cos^2x}-\frac{1}{cot^2x}$
$( 1 - 2 x ) ^ { 3 }$
$\int\frac{1}{5-4\cos\left(x\right)}dx$
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