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Tohaina

a^{3}-3bca+b^{3}+c^{3}
Whakaarohia te a^{3}+b^{3}+c^{3}-3abc hei pūrau ki runga i te taurangi a.
\left(a+b+c\right)\left(a^{2}-ab-ac+b^{2}-bc+c^{2}\right)
Kimihia he tauwehe o te āhua a^{k}+m, e wehea ai e a^{k} te huatahi me te pū nui rawa a^{3}, e wehea hoki e m te tauwehe pūmau b^{3}+c^{3}. Ko tētahi tauwehe pērā ko a+b+c. Whakatauwehea te pūrau mā te whakawehe ki tēnei tauwehe.