Hey there!
The answer is 3
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
First we do 1 ÷ 1, which is 1. Now we are left with 3 + 1 - 1. Now, we do addition. 3 + 1 = 4. Then, subtraction. 4 - 1 = 3.
Hope it helps and have a great day!