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• Identical expressions

• -log((one + x)/(one - x))
• minus logarithm of ((1 plus x) divide by (1 minus x))
• minus logarithm of ((one plus x) divide by (one minus x))
• -log1 + x/1 - x
• -log((1 + x) divide by (1 - x))

• Similar expressions

• -log((1 + x)/(1 + x))
• -log((1 - x)/(1 - x))
• log((1 + x)/(1 - x))