Mathematica immediately allows you to do arithmetic not only with individual numbers, but also with arbitrary lists or arrays—as well as symbolic and algebraic forms.
Mathematica uses the latest platform-optimized algorithms to work with exact and approximate numbers up to billions of digits, as well as polynomials with millions of terms.
Plus (
+) — addition of numbers, lists, arrays or symbolic expressions
Subtract (
-) — subtraction
Times (
×) — multiplication, entered as a space,
* or
× (
Esc * Esc)
Divide (
/) — division, also entered as
÷ (
Esc div Esc)
Power (
^) — power, entered as a superscript using
Ctrl+^
Sqrt — square root, entered as

using
Ctrl+@
Total — total of elements in a list
Accumulate — cumulative sums in a list
Differences — successive differences in a list
Ratios — successive ratios in a list