$4+3x=13$
$3\left(x-2\right)+4<2x+1$
$64y^2-48xy^2+9y^2$
$2\cdot4^2$
$\sin\left(x-\pi\right)+\cos\left(2x\right)=0$
$\left(4m^2+3mn^2\right)^2$
$5\cdot\left(8-12\right)$
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