$\frac{x^2}{x^4}$
$4x^3+3x^2$
$\int4x\cos\left(4x\right)dx$
$\log\:\left(\frac{\frac{135}{242}}{\sqrt{a^3}}\right)$
$n-68=-72$
$x+8<30$
$4\left(4\right)\left(-3\right)$
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