$x^3-5x^2+9x-45$
$sin2a+tan2a+cos2a$
$\int\left(x-2\right)^3\sqrt{-\left(x-2\right)^2+9}dx$
$\sqrt{x}e^{x^2}\left(x^2+3\right)^5$
$5x-4\left(x+2y\right)+9y-7x$
$a-3+2b-5a+ba-3+2b-5a+b$
$\left(x^2+6\right)\left(x^2+3\right)$
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