$7\left(n+5\right)$
$3x+1<4$
$121m^2-144n^2$
$m^2+3m-27$
$4\left(x+4\right)=6x+6$
$\lim_{x\to0}\left(\frac{cot\left(x\right)}{cot\left(3x\right)}\right)$
$\left(t+u^2\right)^7$
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