$\lim_{x\to\infty}\left(\frac{2^x}{5x}\right)$
$2cos^2x\:+\frac{1}{3}sin^2x\left(2+cos^2x\right)$
$4h^2+8h-9$
$y^2\cdot x\:+\:2y^2\cdot x^2=y$
$\left(f+k\right)^7$
$\int\frac{x^2}{\left(x^2-16\right)^{\frac{3}{2}}}dx$
$-3-5.9$
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