$\frac{2a^4-a^3-21a^2+7a+4}{2a^4+5a-4}$
$6-x>4$
$\int\frac{1}{\left(-p^2+600\right)}dp$
$9x^4-21x+6$
$12x^2>0$
$\int\:x\:\ln\left(x^2-9\right)dx$
$2^{18}$
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