hello my world

3 should be three.

My name is David

this is the first part and this is the second part

this is the first part and this is the second part

this is the first part and this is the second part

the result of the calulation is $ calculation

this is true 1

this is false

this is not defined

2018-09-18 10:48:06am

Today is 2018/09/18
Today is 2018.09.18
Today is 2018-09-18
Today is Tuesdayfinished