$y^2-8y+20$
$\int\sqrt{x^2-y^2}dy$
$\int\left(ax^2+4\right)^5dx$
$\left(5-5y\right)^2$
$z^2+7z+6$
$-65+25+-10+40+66$
$25y^2-10xy+4y^2$
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