2 + 4/2 + 1
    ---
2 +  2  + 1
------
  4     + 1
  ---------
       5

Unary Minus

If you look in the table of operators you will see that the character "-" is listed twice, as is the character "+". The unary minus and unary plus operators are used to show a negative or a positive number. For example:

+97.34

means "positive ninety seven point thirty four." The following:

-83

means "negative eighty three." These unary operators have high precedence. Addition and subtraction use the same symbols but have low precedence. For example:

-12 + 3

means add 3 to negative 12 (resulting in -9).

+24 + 3 * -4