$\csc\left(x\right)=\sin\left(y\right)+\cos\left(y\right)\cdot\cot\left(y\right)$
$a+ab$
$\left(-x+-1\right)\left(-x+4\right)\left(1-x\right)$
$67\:+\:86+\:43\:+23$
$\left(a-4\right)^3\:\:$
$8x^3-\frac{1}{27}b^6$
$169-26n+n^2$
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