Estimate 3 squared 51 to the nearest integer

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

What is coefficient of the term of degree of degree 5 in the polynomial below