bagaimana cara mengerjakan soal ini

1) ( 2x + 3y + 5) + (6x - 2y + 6)
= 2x + 6x + 3y - 2y + 5 + 6
= 8x + y + 11

2) ( 5a + 2b + 7 ) - ( 2a + 5y + 2)
= 5a - 2a + 2b - 5y + 7 - 2
= 3a + 2b - 5y + 5

3) ( 2p² - 5p - 5 ) - ( p² + 3p + 11)
= 2p² - p² - 5p - 3p - 5 - 11
= p² - 8p - 16

4) 3(2x - 3)
= 6x - 9

5) 2a ( 3a + b + 5)
= 6a² + 2ab + 10a

6) ( 2x + 1) ( 3x - 7)
= 6x² + 3x - 14x - 7
= 6x² - 11x - 7

7) ( 3x - 5 )(5x + 7)
= 15x² - 25x + 21x - 35
= 15x² - 4x - 35

8) ( 6p + 2q)(2p - 3q)
= 12p² + 4pq - 18pq - 6q²
= 12p² - 14pq - 6q²

9) ( 5a + 9)(11 - 24)
= (5a + 9) ( - 13)
= - 65a - 117

10) (3x - 5)(2x² + 2x + 7)
= 6x³ - 10x² + 6x² - 10x - 21x - 35
= 6x³ - 4x² - 22x - 35