$\frac{1}{csc\left(x\right)}+tan\left(x\right)\cdot cos\left(x\right)\:\:=2sin\left(x\right)\:$
$\csc\left(\infty\right)-\cot\left(\infty\right)=a$
$\left(10x^3-5y\right)^2$
$3x+xy+6;\:x=4;\:y=2$
$\frac{14a^5b^4}{7ab^2}$
$16x^2-12x-4$
$a^2-66a+1080$
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