$9x^2-42xy+49y^2$
$46\cdot2$
$\frac{1}{\frac{dx}{dt}}\:=\:\frac{1}{5-x^2}$
$p^2xp^2$
$\lim_{x\to\infty}\left(\frac{x^2+5}{3x}\right)$
$\int3\sin dx$
$4x+2y+\frac{dy}{dx}\left(3y-2x\right)=0$
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