$10\left(3\left(\sqrt{7}\right)^2+25\right)$
$-145-500$
$\sin\left(x+x\right)=\sin\left(x\right)\cos\left(x\right)+\sin\left(x\right)\cos\left(x\right)$
$\left(7\cdot10^{-4}\right)\left(9\cdot10^{-10}\right)$
$\frac{1296}{8\cdot3^2}$
$\lim\:_{x\to\:-4}\left(\frac{x^3+\:3x^2+\:2x}{x+2}\right)$
$2cos3x=1$
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