$1^2-4\cdot1+3$
$2y_{t+1}-4yt-3=0$
$\left|3-\left(-7\right)\right|$
$\int\cos^54x\sin^94xdx$
$\frac{dy}{dx}\left(2x^2+x+xy=1\right)$
$\frac{sin4\theta\:+sin8\theta\:}{sin4\theta\:-sin8\theta\:}$
$-46+\:\left[56+\:\left(-36-90\right)-50\right]+63+\:\left[86+\:\left(75-15\right)-12\right]+63-145}$
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