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Standard arithmetic: + - * / . Crucial difference from most languages: / requires fractional types (Double, Float, etc.) and div does integer division:

-- 7 / 3   -- ✗ if both are Int — type error
7.0 / 3.0  -- 2.333... (Double)
7 `div` 3  -- 2
7 `mod` 3  -- 1
7 `quot` 3 -- 2 (rounds toward zero, like C's /)
7 `rem` 3  -- 1

The backticks turn a regular function into an infix operator. div and mod round toward negative infinity (mathematically nice). quot and rem round toward zero (matches C).

For power: ^ (Int exponent), ** (floating exponent), ^^ (rational base, Int exponent).

Conversion is explicit: fromIntegral n :: Double — Haskell never auto-promotes between numeric types.