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= 16/12 - 9/12
= 7/12
3) 3/a - 2/a = 1/a
4) 3p/4 + 2q/2 = 3p/4 + 4q/4
= (3p + 4q)/4
5) 6m/n - 2/m - 1/n = 6m²/mn - 2n/mn - m/mn
= (6m² - 2n - m) / mn
6) a + 1/p = ap/p + 1/p
= (ap + 1) / p
7) a/b² + 2/ab = a² /ab² + 2b/ab²
= (a² + 2b) / ab²
8) (m + 2)/3 + n/4 = 4(m + 2)/12 + 3n/12
= (4m + 8)/12 + 3n/12
= (4m + 3n + 8) / 12