Puzzle #4576: Find the Missing Operators

hard

This puzzle necessitates rapid thinking and problem solving aptitude. You'll be given a formulae with three operators missing. Your task is to locate the absent operators and fill in the formulae. It's a superb way to evaluate your understanding of basic mathematics and enhance your reasoning skills. Prepare to exercise your intellect and have fun!

Math puzzle: 9 _ 9 _ 2 _ 4 = -9, find the 3 missing operators
9 ? 9 ? 2 ? 4 = -9

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Solution: 9 - 9 / 2 * 4 = -9
9 - 9 / 2 * 4 = -9

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