$\lim_{x\to\infty}\left(\frac{2^n}{5^{n-1}}\right)$
$3x^3+9x^2-6x$
$7x\cdot7x$
$-1+\frac{\left(5x+6\right)}{\left(x+2\right)^2}$
$384^5\cdot384^5$
$\left(2m-4a\right)^2$
$7x+3\left(5-3x\right)=5$
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