$y=x^2-x^{-1}$
$\int\sqrt{5+9x^2}dx$
$x^2-5x-2$
$2\left(3x+4\right)=-4$
$2y'+4y=2x$
$\left(27-y\right)^2$
$\left(-x-5\right)\left(5+x\right)$
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