$\frac{du}{dt}=\left(1+u\right)\left(7+t\right)$
$10x\:+\:4\:>2x$
$\left(3x-4\right)\left(4x+6\right)$
$9m^{4}+54n+81n^{2}$
$10+5x-6$
$\lim_{x\to\infty}\frac{2x+4}{\sqrt{x^2-3}-1}$
$5n-30=-20$
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