Types of brackets include parentheses () (the singular is parenthesis), square brackets or box brackets [], braces or curly brackets {}, and angle brackets or chevrons (which we've not yet learned). 

The path is: C:\root\documents\secrets\diary.txt. That's complicated! 

It's challenging to type sentences with * and # and ^ (numbers are much easier). 

Let's type emoticons! 
:-) smile 
:-( frown 
;-) wink 
*\o/* cheerleader 

An emoticon (sometimes called a smiley or a graemlin), is a sequence of printable characters such as :), ^-^, or :-) or a small image that is intended to represent a human facial expression and convey an emotion. 

The ^ symbol means exponent (to the power of). So, for example, 5^2 means 5 * 5 (= 25) and 3.2^2 means 3.2 * 3.2 (= 10.24). 

+ means addition, - means subtraction, / means division, * means multiplication. In many cases, you don't need to type the *. 

In mathematics braces are used to delimit sets. For example: E = {1, 2, 3, ..., 1000} or D = {red, white, blue} 

Problem #3: 8^2 - 1 + (56 - 3) / 241 
