pemdas
parentheses/exponents/multiplication/division/addition/subtraction (always remember this, you will always need it in math)
(10-3)+(4-9)
you multiply 5x2 in the parentheses along with 2x2 and 3x3 because of pemdas. so your equation would look like this
(7)+(-5)
then you would do the subtraction inside of the parentheses
then you would add positive 7 and negative 5 which would give you positive 2
7+-5=2
