$6x^2+5y^2+2x^2-3xy^2$
$-15x+35$
$x+10=-45$
$\int\frac{x}{\sqrt{17+16x-x^2}}dx$
$\frac{n\left(2n+1\right)}{\left(n+1\right)\left(2n-1\right)}$
$4x-2y=14$
$\sqrt{9-6}$
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