$x^2=5$

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Block elements

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$$\displaystyle\sum\limits_{i=0}^n i^3$$

Result: 💯 $$\displaystyle\sum\limits_{i=0}^n i^3$$

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$$\frac{n!}{k!(n-k)!} = \binom{n}{k}$$

Result: 💯 $$\frac{n!}{k!(n-k)!} = \binom{n}{k}$$

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$$f(n) =
  \begin{cases}
    n/2       & \quad \text{if } n \ge 0\\
    -(n+1)/2  & \quad \text{if } n \lt 0
  \end{cases}$$

Result: 😭 $$f(n) = \begin{cases} n/2 & \quad \text{if } n \ge 0\ -(n+1)/2 & \quad \text{if } n \lt 0 \end{cases}$$

It should look like this: