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Упростите выражение x^2+1/ x+1 * x2+2x+1/ 1-x^4
x^2+1/ x+1 * x^2+2x+1/ 1-x^4 = (x^2 + 1)(x+1)^2 / (x+1)(1-x^2)(1+x^2) = (x+1)/(1-x)(1+x) = 1/(1-x)
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x^2+1/ x+1 * x^2+2x+1/ 1-x^4 = (x^2 + 1)(x+1)^2 / (x+1)(1-x^2)(1+x^2) = (x+1)/(1-x)(1+x) = 1/(1-x)