Product of consecutive even (OR) odd natural numbers is given as in th

This question was asked in Ex 8.3, 1 (a)

Product of consecutive even (OR) odd natural numbers is given as in the example
11 x 13 = 143 = (12) ² - 1
Similarly = 13 x 15 = (14) ² -1 = 195
Now complete the given statement = 29 x 31 =?