$e^x\cdot e$
$\ln\left(x-87\right)-\ln\left(x+23\right)$
$8 x ^ { 3 } + 6 x$
$169x^2117x+81$
$81x^2-49y^2$
$3x+5>8$
$\frac{x-5}{x^2-7x+10}$
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