MySQL arithmetic subtraction

Question

I have a table like this:

MYSQL 
table_01            tablo_02

Calculated tax      Deductible tax
--------------      ---------------
1200                2100
2305                5200
3250                1200    
2501                3215

I want such a result

total table_01 - total table_02 = result

Answer 1

Something like this:

select (
        select sum(calculated_tax)
        from table_01
        ) - (
        select sum(deductible_tax)
        from table_02
        ) as result