The first sign of syphilis is a small sore, called a chancre (SHANG-kur). The sore appears at the spot where the bacteria entered your body. While most people infected with syphilis develop only one chancre, some people develop several of them. The chancre usually develops about three weeks after exposure.
The colon is the symbol :. It is used in a number of different ways in mathematics. 1. To denote ratio or odds, as in 2:1 (voiced two to one). 2. To mean such that in constructions such as (voiced the set of numbers such that ). 3. To give a name to a map, e.g., (which is equivalent to the function notation ).
Guys, I am not proud of you today! the ^ symbol has nothing to do with the exponential in mathematics. The ^ symbol represent the logical conjunction, or more simply the logical and. Having ^ represent the exponential is not a mathematical convention, it is a text formatting shortcut, probably started by latex.