How to calculate 4 = 3 with four operations and brackets
4-4+4-4/4=4-1=3
How to calculate 5 = 12 with four operations and brackets
5+5+(5+ 5)÷ 5=12
In four mixed operations, if there are two levels of operations in parentheses, we should calculate () first, then () method
Multiplication, addition and subtraction