jupyter reference subtitle code example
Example 1: code in markdown jupyter
```python
print "Hello World"
```
o/p
print "Hello World"
Example 2: summation in jupyter markdown
$$e^x=\sum_{i=0}^\infty \frac{1}{i!}x^i$$
```python
print "Hello World"
```
o/p
print "Hello World"
$$e^x=\sum_{i=0}^\infty \frac{1}{i!}x^i$$