Mathematics · Mathematical Operations

What will come in place of the question mark (?) when '+' and '−' are interchanged and '5' and '18' are also interchanged? 5 − 18 + 12 = ?

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What will come in place of the question mark (?) when '+' and '−' are interchanged and '5' and '18' are also interchanged? 5 − 18 + 12 = ?

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What will come in place of the question mark (?) when '+' and '−' are interchanged and '5' and '18' are also interchanged? 5 − 18 + 12 = ?

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