three angles of a polygon are 125,140,160.the remaining angles are 145 each calculate the sum of the interior angles of the polygon​

i think it might be a but you might want a second opinion

1. a^4+8a^3+24a^2+32a+16

2.y^8+8y^7+28y^6+56y^5+70y^4+56y^3+28y^2+8y+1

3.x^6-3x^4y^2+3x^2y^4-y^6

umm you say your want to . but you do know that this is the mathematics.  

o~o

  lol