$\sin^2\left(x\right)+6\cos\left(x\right)+15$
$\left(\frac{1}{2}a^2+\frac{2}{3}b^2\right)^2$
$72+3x+3$
$81x^2-6x+3$
$a^3+8b^6$
$\frac{64x^3y}{2^3xy}$
$9m+3m$
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