$tan^2x+cot^2x=sec^2+csc^2x-2$
$\left(-0.3\right)\cdot\left(-0.3\right)\left(-0.3\right)^2$
$p2\:+\:7p\:+\:10$
$\ln x^2+3\ln y$
$2x^2-100$
$3oab+ab-28cd-10ab-10cd-d$
$\int\:\:-\frac{1}{6}xcosxdx$
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