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Does the author mean that [itex]−3 × 4 = 0 − 3 × 4 = −(3 × 4)[/itex] or else?Example 1.2.1. We have −3 × 4 − 5 + (−3) = −(3 × 4) − 5 + (−3) = −12 − 5 − 3 = −20. Note that we have recognized that 3 × 4 takes precedence over the − signs.

I consider the minus-sign to be a unary operator, which is preceded by multiplication and division. Am I thinking right?