Find `hati xx (veca xx hati) + hatj xx (vecaxx hatj) + hatk xx (veca xx hatk)`

If veca=2hati+hatj+2hatk then the value of |hati xx(veca xxhati)|^2+|hatj xx(veca xx hatj)|^2+|hatk xx(veca xx hatk)|^2 is

For any vectors veca and vecb, (veca xx hati) + (vecb xx hati) + ( veca xx hatj) . (vecb xx hatj) + (veca xx hatk ) .(vecb xx hatk) is always equal to

What is hati . ( hatj xx hatk) ?

(veca hati)hati + (veca hatj)hatj + (veca hatk) hatk is value of :