Draft issue 1

[yuriGrinats]

Test preview.

This is a test preview.

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#### We can hide anything, even code! ```ruby puts "Hello World!" ```

Fenced code blocks

You can create fenced code blocks by placing triple backticks ``` before and after the code block. We recommend placing a blank line before and after code blocks to make the raw formatting easier to read.

function test() {
  console.log("notice the blank line before this function?");
}

Creating a table

You can create tables with pipes | and hyphens -. Hyphens are used to create each column's header, while pipes separate each column. You must include a blank line before your table in order for it to correctly render.

First Header	Second Header
Content Cell	Content Cell
Content Cell	Content Cell

Writing mathematical expressions

To include a math expression inline with your text, delimit the expression with a dollar symbol $.

This sentence uses $ delimiters to show math inline: $\sqrt{3x-1}+(1+x)^2$

To add a math expression as a block, start a new line and delimit the expression with two dollar symbols $$.

The Cauchy-Schwarz Inequality

$$\left( \sum_{k=1}^n a_k bk \right)^2 \leq \left( \sum{k=1}^n ak^2 \right) \left( \sum{k=1}^n b_k^2 \right)$$

[yuriGrinats]

The Cauchy-Schwarz Inequality

$$\left( \sum_{k=1}^n a_k bk \right)^2 \leq \left( \sum{k=1}^n ak^2 \right) \left( \sum{k=1}^n b_k^2 \right)$$