$t=3s+3.22$
$0.25+1.5-k-3.5$
$\frac{d}{dx}\left(y=\left(\cos\left(x\right)^{\tan\left(y\right)}\right)\right)$
$4-4x^2+4x^4$
$1-2sinxcosx=1-sin2x$
$\left(\:13\:+\:x\:\right)\:\left(13\:-\:x\right)\:$
$16^7\cdot16^{-7}$
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