(i) a(b+c+d) = ab+ac+ad(ii) (x+y)5xy = 5x²y + 5xy²(iii) p(6p²p+5) = 6p³ + 5p(iv) 4p²q²(p²-q²) = 4p⁴q² - 4p²q⁴(v) (a+b+c)abc = a²bc + ab²c + abc²