Now we'll consider some expressions that are more complicated, and will involve the order of operations and use of parentheses. Let's evaluate the expression
A helpful tip is to remember that a division bar acts as a grouping symbol. Since we cannot enter the expression exactly as it looks, we must add parentheses to replace the division bars whenever there is more than one term in a numerator or a denominator. In this case, we need parentheses around both denominators.
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3.7 
2.9 
1.3 
6.2 
