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[1*2+2*3x+3*4x^(2)+....oo(|x|<1)],[3+5x+...

[1*2+2*3x+3*4x^(2)+....oo(|x|<1)],[3+5x+9x^(2)+15x^(3)+23x^(4)+33x^(5)+....oo(|x|<1)]

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