$\left(x-10\right)\left(x-30\right)\left(x-40\right)$
$3x^2-30x=0$
$144x^2+72xy+36y^2$
$x=\sqrt{4x^2-5x+50}-x$
$3xy^2-x^2$
$-\left(12-8\right)-\left(27-36\right)-\left(-9+52\right)$
$-x^3+9x^2-18x+10$
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