$-2+81+2^2$
$\frac{1}{\csc^2x}+\frac{\cos x}{\sec x}$
$2b\:-\:5\:+\:6\:+\:9b$
$\lim_{x\to0}\left(x^{4sinx}\right)$
$-6\cdot\left(-18\right)$
$94<\frac{2m}{3}+36$
$\left(\frac{2}{1}z\right)-\left(\frac{3}{5}z\right)$
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