$\lim_{x\to-0.01}\frac{\sin\left(x\right)}{1+\tan\left(x\right)}$
$\csc\left(-0.1898\right)$
$2^3\cdot2^{-1}$
$4\left(-2\right)\left(2\right)^3$
$\frac{q^2}{q^6}$
$2x-5\ge3$
$\left(2+3i\right)\left(2-3i\right)$
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