$2x+4y-5x+10y$
$\left(3.28\right)^0$
$-2\left(\left(-4\right)-8\right)$
$\frac{d}{dx}\left(5^x+\ln\left(x\right)\right)$
$\sqrt{1}40$
$\frac{sina\cdot\:\:sinb}{cosa\cdot\:\:cosb}$
$1.5\cdot10^7-2.7\cdot10^9$
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