$\left(r^8+1\right)^2$
$\frac{9x^3+6x^2+7}{x+6}$
$m^4-22m^2+40$
$\cos\left(60\right)\cos\left(45\right)-\sin\left(60\right)\sin\left(45\right)$
$\int sin6xsin4xdx$
$\left(a-b\right)^2-\left(c-d\right)^2$
$\left|567\right|$
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