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• Identical expressions

• - one / two + one /x = zero
• minus 1 divide by 2 plus 1 divide by x equally 0
• minus one divide by two plus one divide by x equally zero
• -1 divide by 2 + 1 divide by x = 0

• Similar expressions

• 1/2 + 1/x = 0
• -1/2 - 1/x = 0