$\frac{\left(secx-cosx\right)}{3tanx\cdot sinx}$
$n^2-n-72$
$-c+2c$
$\frac{\cos2a}{\cos a+\sin a}$
$x^2\:+\:\frac{319}{109\:}\:+\:\frac{101761}{11881}$
$\int\left(1-sin\:\frac{t}{5}\right)^2cos\:\frac{t}{5}dt$
$3 - 2 ( x - 1 ) \leq 2 ( 4 + x )$
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