$15n>12n+18$
$6a^2-9a$
$\frac{v+6}{8}=\frac{v+5}{7}$
$2\sin\:^2\left(x\right)-\sin\:\left(x\right)-1=\frac{\pi\:}{8}$
$\left(2k-3j\right)^3$
$\lim_{x\to2}\left(\sqrt{4x^2-2x}\right)$
$\left(2ax^a+4\right)\left(2ax^a+8\right)$
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