$4sin^2\left(x\right)+2cos^2\left(x\right)$
$\frac{d}{dx}arcsen\sqrt{x^2-4}$
$\frac{1}{2}\left(8y-10z\right)-\left(3y+z\right)$
$4p-2$
$3\left(n-1\right)<21$
$-3x^{-7}y^{-6}7x^{11}y^{-5}$
$\frac{e^{-x}}{4-e^{-2x}}$
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