$15\left(5+x\right)+9x$
$\cos^2\left(x\right)+0.5\sin\left(2x\right)=1$
$\left(2x+3y^3z^2\right)^2$
$8x^2-24x+18$
$x^2-x-6\ge0$
$125x^3+8x^3$
$33=3\left(2x+3\right)$
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