Prove that $(\overrightarrow{a}\times\overrightarrow{b}) . (\overrightarrow{c}\times\overrightarrow{d}) + (\overrightarrow{b}\times\overrightarrow{c}) . (\overrightarrow{a}\times\overrightarrow{d}) + (\overrightarrow{c}\times\overrightarrow{a}) . (\overrightarrow{b}\times\overrightarrow{d})=0$

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