Number of boys and girls in a class are in the ratio 7 : 5. The number of boys is 8 more than the number of girls. The total class strength is

Sum of three consecutive integers is 51. The middle one is

The sum of two numbers is 95. If one exceeds the other by 15, then the smaller of the two is

Subtract 4a² + 5b² - 6c² + 8 from 2a² - 3b² - 4c² - 5.

Find each of the following products:

(i) (4a + 5b) x (5a - 6b) (ii) (6x² - x + 8) × (x² - 3)