$k^2-4k+3$
$\left(x+4\right)^2=8x+\left(2x-1\right)^2$
$\frac{dy}{dx}\left(x\cdot y=1\right)$
$\left(5m^3\right)^2$
$\left(x^hy^kb^c\right)^5$
$x^4+14x^2+49$
$.\left(xy^3+10\right)\left(xy^3-10\right)$
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