$\displaystyle\sum_{butter}^{peanut}\frac{jelly}{time}$

stuffaasdasd
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BULLSHIThujcipa

$||x+y||^2 = \sum (x+y)^2 = \sum (x^2 + 2xy +y^2) = \sum x^2 + \sum 2xy + \sum y^2$

$\displaystyle a \buildrel{\cdot}\over- x$ 
$\buildrel{\scriptscriptstyle\rm def}\over\Leftrightarrow$