$\int\frac{1}{x^2+6}dx$
$2b+2c$
$\sin\left(b\right)\sec\left(b\right)$
$\frac{0}{1}\cdot5$
$\sin^2x=2\sin x$
$5abx+8bcd-8abc$
$\left(2c^2h\right)\left(4c^3h^2\right)$
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