What is 7 + 12 - 8 + 3 - 9 of 6 + 1 - 13 * 4?

 To solve these expressions, we need to follow the order of operations, which is commonly remembered as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) or BODMAS (Brackets, Order, Division and Multiplication, Addition and Subtraction).

For the first expression, we can simplify it as follows:

7 + 12 - 8 + 3 - 9 = (7 + 12 - 8) + 3 - 9 (grouping the addition and subtraction in parentheses to perform them first) = 11 + 3 - 9 = 5

For the second expression, we can simplify it as follows:

6 + 1 - 13 * 4 = 6 + 1 - 52 (multiplying before addition and subtraction) = -45

Therefore, the value of the first expression is 5 and the value of the second expression is -45.

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