$2\cos\left(2x\right)-\sqrt{2}$
$e^x\left(\frac{1}{x}\right)$
$\sqrt{2sec\left(x\right)^2-4}$
$-\left(-2+3\right)^2$
$5\left[7+3\left(2x-4\right)\right]+8$
$20+90+518b$
$9x^2-45x+14$
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