$27c^3+8d^3$
$196a^2-140ab+25b^2$
$-x^2-2x-3>0$
$-330-300-200-170-270-10+80$
$\left(x+2y+3\right)\left(x+2y-3\right)$
$\frac{1+sin\left(x\right)}{1+\frac{1}{csc\left(x\right)}}$
$\sin\left(-\frac{20}{29}+-\frac{7}{25}\right)$
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