$\lim_{x\to0}3\left(\frac{1}{x}-cscx\right)$
$3a\:\:+2a^{\:3}\:\:-\:\:\:2a\:\:\:5a^3$
$csc\left(x\right)-2cos\left(x\right)cot\left(2x\right)=2sin\left(x\right)$
$\lim_{x\to6}x\left(24x^2\:-96-\frac{1}{6}\:\right)\left(x^2-4\:\:\:\:\right)$
$3\cdot\left(5+3-2\right)\cdot\left(7+1\right)$
$\left(7xy-4\right)\left(6x+5y-2\right)$
$1+2-1-3$
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