$-\left(-1^2\right)+2\left(-1\right)+2$
$\left(\frac{7y}{x}\right)\cdot\left(\frac{x}{y}\right)$
$\left(a^2-4\right)\left(a^2+8\right)$
$t^{-1}\frac{dy}{dt}=2cos^2y$
$-4x^3-9x^2-6x-2$
$\lim_{x\to1}\left(\frac{x^3-3x^2+2}{x^3-1}\right)$
$ax+5x+2a+10$
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