prove this plzzzzzzz
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(x+y+z)*1/(1/xy+1/yz+1/zx)
(x+y+z)*1/( xy z^2+x^2 yz + x y^2 z)/(x^2 y^2 z^2)
(x+y+z)*1/(xyz(z+x+y)/xyz)
(x+y+z)*1/(x+y+z/xyz)
x+y+z*xyz/(x+y+z)
xyz
RHS= xyz
LHS=RHS