C-10-Q047mediumsingle_mcqThe expansion of (x+y)5(x+y)^5(x+y)5 is —ax5+5x4y+10x3y2+10x2y3+5xy4+y5x^5+5x^4y+10x^3y^2+10x^2y^3+5xy^4+y^5x5+5x4y+10x3y2+10x2y3+5xy4+y5bx5+4x4y+6x3y2+4x2y3+y5x^5+4x^4y+6x^3y^2+4x^2y^3+y^5x5+4x4y+6x3y2+4x2y3+y5cx5+5x4y+5x3y2+5x2y3+5xy4+y5x^5+5x^4y+5x^3y^2+5x^2y^3+5xy^4+y^5x5+5x4y+5x3y2+5x2y3+5xy4+y5dx5+5x4+10x3+10x2+5x+1x^5+5x^4+10x^3+10x^2+5x+1x5+5x4+10x3+10x2+5x+1