$x^2-20x+25$
$-10=-5$
$x^3-5x+4\:-3x^2+2x+6-x^3-4x-8$
$\frac{\frac{d}{dx}\left(\arccsc\left(x\right)\right)}{e^x}$
$4a+4b-3a$
$4x+3y+-5y+3xy+y$
$6\left(a^2+4\right)-3\left(a^2+1\right)$
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