Alright so we know that n = 4 so we just plug 4 where the n is.
7 × 6 + 4 × 2
So the first thing you do is multiply 7 × 6 which gives you 42. Then you do the same for 4 × 2 which is 8.
After that you add 42 + 8 which gives you 50.
So your answer is A. 50
Hope that helped!