solve the following expressions. show your step by step solution.

1. 18 divide 9 plus 48 divide 6 equals ________
2. 3³ plus 45 divide 9 minus 12 equals _________
3. 4 times 9 minus 12 minus 5 over seven equals __________
4.(12 plus 6) divide (8 minus 2) plus 39 equals ________
5.The difference between 648 and 522 is multiplied by the quotient of 144 and 12._______
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