[TOC]

# test

## input
Hello World written by Markdown.
日本語もおｋ。

## math
inline math: $\sin^2 \theta + \cos^2 \theta = 1$
display math:
$$
\int_{-\infty}^{\infty} e^{-x^2} dx = \sqrt{\pi}
$$

## source code

include<stdio.h>
int main(int argc, char** argv)
{
    printf("Hello World written by C.\n");
    return 0;
}

## list
- item 1
- item 2
- item 2-1
- item 3