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If bar(a)=(3hat i-hat j)/(sqrt(10)),bar(...

If `bar(a)=(3hat i-hat j)/(sqrt(10)),bar(b)=(hat i+3hat j+hat k)/(sqrt(11)),` then the value of `(2bar(a)+bar(b))*[(bar(a)timesbar(b))times(bar(a)-3bar(b))]`

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