RT
n+x2+y2=2yz(x+2)4x(x2+2z2)x(x2+2xy+2y2)+y3−(x−y)3+(x−y)2n+x^2+y^2=2yz(x+2)\dfrac{4x(x^2+2z^2)}{x(x^2+2xy+2y^2)+y^3-(x-y)^3}+(x-y)^2n+x2+y2=2yz(x+2)x(x2+2xy+2y2)+y3−(x−y)34x(x2+2z2)+(x−y)2
