$\lim_{y\to-\infty}\left(\frac{2-y}{\sqrt{7+6y^2}}\right)$
$-40\:x\:-3$
$405x^2-450x+125$
$sin\frac{\pi}{5}\cos\frac{\pi}{2}+sin\frac{\pi}{2}\:cos\frac{\pi}{5}$
$144x^2-y^{10}$
$2\cdot128$
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