$2\cdot\cos\left(3x\right)=0.5$
$-2s^2+3s+27$
$6m+m^2-2=0$
$\sqrt[3]{b^9}$
$4\sqrt{\left(198.81\cdot25.96\right)}^3$
$\left(2x-5y+2x\right)^2$
$\left(v+15\right)\left(v-15\right)$
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