Add parentheses to make the following expression true: 3 * 5 + 7 - 3 = 33

(3 * 5) + 7 - 3 = 33

3 * (5 + 7) - 3 = 33

3 * 5 + 7 - 3 = 33

3 * 5 + (7 - 3) = 33

Answer:
3 * (5 + 7) - 3 = 33

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