$\left(\frac{x^3}{5}\right)^4$
$6+15x\ge18+12x$
$-6+4+4$
$\left(14+xy\right)\left(14-xy\right)$
$3\tan^2x-2=5\sec^2x-9$
$x^2-9x-220$
$\int\frac{t^4+9}{\left(t^4+9t^2\right)}dt$
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