$8+5v+-7$
$2ab+4a$
$3\cos^2\left(a\right)+\cos\left(a\right)=0$
$\left(2a-6b\right)^2$
$\sqrt{a^2b}.\sqrt[4]{abc}$
$-5\cdot2+11$
$x+5\le x+3$
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