$\frac{4x^5-3x^2+x-+1}{2x^3-1}$
$\left(\frac{1^x}{e^x}\right)$
$bc+bc$
$4x+3<39$
$5+5+1$
$\frac{sin^2}{tan^2}\:$
$\:7x\:-\:210\:=\:14\:$
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