$tan^2x+tanx\:cotx=sec^2x$
$256-64\cdot2$
$\left(3^3\right)\left(3^5\right)$
$\int e^{-3x}\left(2x+1\right)dx$
$5d+2=3d-12$
$25n^2-30n+16$
$10+10\cdot10$
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