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• Identical expressions

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

• Similar expressions

• 2*(-2*x^2/(x^2 + 1) - 1)/(x^2 + 1) = 0
• 2*(-2*x^2/(x^2 - 1) + 1)/(x^2 + 1) = 0
• 2*(2*x^2/(x^2 + 1) + 1)/(x^2 + 1) = 0
• 2*(-2*x^2/(x^2 + 1) + 1)/(x^2 - 1) = 0