Give two examples that show how using parentheses can change the order in which operations are performed in an expression

Example  1.
(40*2) - 8/12

Simplify 40×2 to 80

80−

 Simplify


Example 2.
40*(2 -8/12)

Simplify

40(2-)
which is 40 x 

Simplify once more and your answer is 

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