Add together the following quantities: 13. a+11bc-3x+17x+3a-11bc+17a-14+728 -34a+16bc. 14. 3a-x+41 +3ac-11a+34+7ac-3ac+4a-5 15. +4bc. 16. 7a-3bc+4ac+9a-11+11a-11bc+4ac-7 34ac-7a+14-11ac +11-8a+ c. Add together the following quantities: 17. 17ac-3a +4c; 8c-4a+4ac; and 3ac-4c+6a 18. 3ax + bxy - 3cy; 11bxy + 6cy - 6cx; and 11ax+3cy-11bxy. 19. Add together the following:-17 cows, 3 horses, and 9 pigs; 11 cows, 12 horses, and 8 pigs; 17 horses, 9 cows, and 13 pigs; 11 pigs, 16 cows, and 3 horses. 20. Add together the following:-6 cows, 3 pigs, and 9 carts; -17 cows-13 pigs and 21 carts; and 17 carts-14 pigs and 7 cows. 21. (7a-c+6b)+(3a-4c+8b)-11a+4c. 22. 34a+ax+by-(11a-ax-by)+11ax. 23. a+b―c+b-c+4a-c+x. 24. 3a2+x2+ y2; 4x2—y2—3x2; 11y2—18a2+14x2. 25. 11abx Засх + 4аах +16acx-11adx+14abx. Find the sum of— 31ada+11acx - abx 26. 4a-2b+3-3a+4b-8+16a+3b-9+6a. 27. ax+bx+cx-11+11ax +4bx-8cx+19+3αx -6bx+8cx+31-17. 28. +9bxy+3bxy+3x-9bxy-8bxy-11x-3bxy 29. a2b2 - 3abx+7ax−8a2x2+11a2x2+8abx+17ax -8ax. 30. 3axy-74axy2-11ax+7-64axy+14axy2+11 -6ax+7ax+axy +axy2+ax. 31. 11ax-by+3ax−4by+81-17axy+axy. Add together the following quantities: 58. 6a2-362+5d-8a2+6d-8b2+6-11a2+6d. 60. 4-11by+cx-8+8by-4cx+8cx-9by+11. 61. 8aby4acy + 6cy + bx - Saxy+8acy- 8cy -4bx-8bx+8cy--8acy+11aby. 62. 4a2+b2+c2-8a2+862-12c2-8c2+862-12a2 +84. 63. (axy + bxy cy) + (6axy - 7bxy +11cy) +(3axy+6bxy—12y)+11axy-6bxy. 64. (a2+2ab+b2)—(a2 —2ab+b2) − (a2+2ab+b2). 65. (x2—y2)—(x2+y2)+2xy−3x2+4y2. 66. a2-3ab2+x2-6a2+6ab2-4x2-(a2x2). 67. 3x2-4xy+y2 — (3x2 —4xy+y2)—8xy. 68. 6-11a-4by+6-12ax+8by-(by+ax). 69. 16-8x+6by-11ax+12by-8by-11ax. 84ax-6by—8bx-74ax+7by+6bx−12. 70. 71. 3x + 7y 72. 2x-3y -4x+6y -3x+2y -7xy+2xz 6x-7y 73. 8x2y-3xy+7xz-7 2x2y+2xy-2xz-4 3xy-3xy- xz 6xy-2xz -4x2y + xy + xz+4 ―5x2y—6xу+2xz |