$x^2-bx$
$y^2+6yw+9w^2$
$\int_0^1\left(\frac{x^2+x}{x^2+x+1}\right)dx$
$\sqrt{2}\sqrt{3}$
$64\cos\left(x\right)^2+64\sin\left(x\right)^2$
$18x+9-4$
$\left(3x^2-\:2\right)^2$
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