$sin3y\cdot\:\:cos\left(-y\right)-cos3y\cdot\:\:sin\left(-y\right)$
$3\sec^2x=4$
$5^264$
$93.895-54$
$\left(7xy^3+6xz\right)\left(7xy^3-6xz\right)$
$\frac{x}{6}-5=-2$
$\int-3\left(-9x+2\right)^{\frac{3}{8}}dx$
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