The highest exponent is the 4, so that entire term must be written first: 5x4
The next highest exponent is the 2 so that term comes next. So far we have : 5x4+x2
The next highest exponent is the 1so add that term to get: 5x4+x2+6x
The constant term (a number with no variable) always comes last so the final answer is: 5x4+x2+6x+3 (Answer)