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If bar(a)=(1)/(sqrt(10))(3hat(i)+hat(k))...

If `bar(a)=(1)/(sqrt(10))(3hat(i)+hat(k))` and `bar(b)=(1)/(7)(2hat(i)+3hat(j)-6hat(k))` then the value of `(2bar(a)-bar(b)*((bar(a)timesbar(b))times(bar(a)+2bar(b))}` is equal to

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