Refer to Expression 1 and Expression 2.
Expression 1: 6 * 7 - 3^2 * 9 + 4^3
Expression 2: 5 + 4 * 2 + 6 - 2 * 2 - 1
(a) What is the value of Expression 1?
(b) Insert parentheses in Expression 2 so that it has a value of 19. Then show why your expression has a value of 19.
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