Modular arithmetic operations:
- Addition: (a + b) mod n
- Subtraction: (a - b) mod n
- Multiplication: (a × b) mod n
- Exponentiation: (a^b) mod n
- Multiplicative Inverse: a⁻¹ mod n (a×a⁻¹ ≡ 1 (mod n))
Note: The multiplicative inverse requires a and n to be coprime.