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• Identical expressions

• - one /(x^ two - one) = zero
• minus 1 divide by (x squared minus 1) equally 0
• minus one divide by (x to the power of two minus one) equally zero
• -1/(x2 - 1) = 0
• -1/x2 - 1 = 0
• -1/(x² - 1) = 0
• -1/(x to the power of 2 - 1) = 0
• -1/x^2 - 1 = 0
• -1 divide by (x^2 - 1) = 0

• Similar expressions

• 1/(x^2 - 1) = 0
• -1/(x^2 + 1) = 0