These are operators for math calculations.
Examples below show simple calculations (mainly) using the arithmetic operators.
4+10
## [1] 14
5+(2*3)
## [1] 11
3^2
## [1] 9
sqrt(3^2) # Square root of 3^2
## [1] 3
a <- 6 ; b <- 10*3 b/a
## [1] 5
