$2\csc\left(45\right)^2=\frac{1}{\left(1+\cos\left(a\right)\right)}+\frac{1}{\left(1-\cos\left(a\right)\right)}$
$\int\pi dn$
$1-2x\le0$
$\frac{cosx\:cscx}{tanx}$
$\frac{xy}{xy}$
$\left(\sin\left(x\right)\right)\left(\tan\left(x\right)\cot\left(x\right)\right)$
$53,45+87,2$
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