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+10x