एक्सपेंड यूजिंग सूटेबल आईडेंटिटी
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u have to do it for yourself to get
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solution, (x+2y+4z)^3
=x^3+8y^3+74088+6x^2y+126x^2+12xy^2+504y^2+5292x+10584y+504xy
hope it's helpful
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