B. Add the following polynomials and arrange the sum in ascending order. 1. 4x, 3x, X.- X 6. T2 - 2rs + 14rs + 9r2 2.-2a. Sa, a. 5a2 7. 12mn -3n - 6n + 9mn + 8n 3. ab, ab, b, 2b 8. 16a2 - 3b3 + 9a2 + 4b3 4.-312, 5r. 2r, 10, -5 3 1 9. 5x + 4x + -y + -y zy 3 10.-r - 8sts 4 5. За , 5а, -а, - заз​