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expanded form of (1+ x + x^2/2 + x^3/6 + x^4/24 + x^5/120 +x^6/720)(x + 2x^3 /3 + 2x^5 /15)
expanded form of (1+ x + x^2/2 + x^3/6 + x^4/24 + x^5/120 +x^6/720)(x + 2x^3 /3 + 2x^5 /15)
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