$\:122-5.5$
$\left(-4x-9\right)^2$
$\left(5x^4-\:2\right)^2$
$4\cot x-5=0$
$\log\left(\frac{6c}{8}\right)$
$5x^2+4x^2+3$
$m=3^{x+y}$
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