$5\sec^2x+2\tan x-8$
$\cos\left(x\right)=-0.254$
$3\left(x^2\right)\left(2\sqrt{x}\right)^2$
$49x^2-36x^2$
$-27+476$
$\left(\frac{3p}{2}-\frac{5q}{2}\right)$
$3\cdot\left(-2\right)-5\cdot3+4\cdot\left(-3\right)-3$
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