$\left(2x^3-y\right)^2$
$67\:+\:399\:=\:$
$13x^3-2x^2+15x-18y+8x^3+10$
$5x+6<10x-10$
$3b+a-b+4a$
$\tan\left(x\right)\cdot\left(\sin\left(x\right)^2\right)+\frac{3\cos\left(x\right)^2}{\sin\left(x\right)}$
$\theta\theta+\cos\theta$
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