$\left(4x^3y-5z\right)\left(4x^3y+5z\right)$
$\lim_{w\to38}\frac{\cos\left(wt\right)-\cos\left(38t\right)}{1444-w^2}$
$e^{\infty^2}$
$1.5-3r+8r+2.5r$
$5\left(x\:-\:1\right)\:<\:5x\:-\:3$
$2cos\left(\frac{x}{2}\right)+1=0$
$25x^2+100x=0$
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