$y''-6y'+14y=0$
$\lim_{x\to\infty}\left(\frac{1}{e^x}\right)$
$0.0672\cdot0.09854$
$2\:+6\:-4\:+1$
$-9-1v$
$18\:-\:7\:.\:3\:$
$\sec\left(x\right)\csc\left(x\right)+\left(\tan\left(x\right)+\cot\left(x\right)\right)=2\csc\left(x\right)\sec\left(x\right)$
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