i) 2π₯ β 5π₯π¦ + 7π§ + 3π₯π¦ β π§ + 4π₯(ii) 3π₯(2π₯ + 5π¦) β 11π¦(7π₯ β π¦)(iii) (π₯ + 3π¦)(2π₯ β 7π¦) + π₯π¦(2π₯ + 3π¦)(iv) (π 2 + 2π 2 )(3π + ππ β 7π 2 ) β ππ(π 2 + π 2 )(v) (π₯ + 3π§)(π₯ β π¦) + (π§ β 2π¦)(2π¦ β 5π₯)
i) 2π₯ β 5π₯π¦ + 7π§ + 3π₯π¦ β π§ + 4π₯
(ii) 3π₯(2π₯ + 5π¦) β 11π¦(7π₯ β π¦)
(iii) (π₯ + 3π¦)(2π₯ β 7π¦) + π₯π¦(2π₯ + 3π¦)
(iv) (π 2 + 2π 2 )(3π + ππ β 7π 2 ) β ππ(π 2 + π 2 )
(v) (π₯ + 3π§)(π₯ β π¦) + (π§ β 2π¦)(2π¦ β 5π₯)









