Please Excuse My Dear Aunt Sally (PEMDAS), she has the hardest time remembering how to make sense of these arithmetic rules...
Evaluate \[50-13 \times 3+20+7 \times 5.\]
Evaluate \[33 \div 11 \times 6 + 21 - 15 \div 5.\]
Evaluate \[-3 + 8 \div 5 \div 4 \times 10 + 7.\]
What is the value of \[ 4 \times 8 \div 4 \times 4 ?\]
Evaluate \[45+7 \times 3+5-7 \times 4.\]
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