Let `veca and vecb` be unit vectors such that `|veca+vecb|=sqrt3`. Then find the value of `(2veca+5vecb).(3veca+vecb+vecaxxvecb)`

Explanation

To solve the problem step by step, we start with the given information and proceed to find the required value.

### Step 1: Understand the given information
We have two unit vectors \(\vec{a}\) and \(\vec{b}\) such that:
\[ |\vec{a} + \vec{b}| = \sqrt{3} \]
Since \(\vec{a}\) and \(\vec{b}\) are unit vectors, we know that:
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