$\sin\left(35\right).\tan\left(55\right)$
$sin\:2x\:cos\:2x$
$8x-2+-2+-2+-2+-2+-2+-2+-2+-2+-2$
$r+10+8-2r$
$\frac{216-x^3}{6-x}$
$\left(5y^2-9\right)\left(5y^2+12\right)$
$\frac{4x}{1+2x-3x^2}$
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