Разложите на множители многочлен
х+y-x(в 3 степени)-y(в 3 степени)
х+у-х^3-y^3=x+y-(x^3+y^3)= (x+y)-(x+y)*(x^2-xy+y^2)= (x+y)*(1-x^2+xy-y^2)
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х+у-х^3-y^3=x+y-(x^3+y^3)= (x+y)-(x+y)*(x^2-xy+y^2)= (x+y)*(1-x^2+xy-y^2)