300
A circular plot of land has an area of 7x(to the fifth)-x(to the third)+4x(squared)+9. If the walkway around this piece pf land has an area of x(to the fourth)-4x(to the third)+2x, what is the total area combined?
7x(to the fifth)+x(to the fourth)-5x(to the third)+4x(squared)+2x+9