$\tan^2x-3\tan x-4$
$\left(x+3\right)\left(x-7\right)+2\left(x^2+2x+10\right)$
$5e^{-5\cdot14}$
$\tan\left(-a\right)\sin\left(-a\right)+\cos\left(-a\right)=\sec\left(a\right)$
$y^2=28x$
$\left(x+4\right)\left(x^3+4\right)\left(x\right)$
$2xydy=-\left(x^2-y^2\right)dx$
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