a)A = 1 + 1/2 . (1 + 2) + 1/3 . (1 + 2 + 3) + 1/4 . (1 + 2 + 3 + 4) + ... + 1/200 . (1 + 2 + ... + 200)
b)B = \(\dfrac{1.5.6+2.10.12+4.20.24+9.45.54}{1.3.5+2.6.10+4.12.20+9.27.45}\)
c)C = \(5\dfrac{2}{5}\) + (-5,35) + \(\dfrac{1}{3}\) + (-2,46) + (-1,19) + \(\dfrac{4}{15}\)
d)D = \(\dfrac{25^{13}.9^6.24^7}{50^{12}.81^5.40^3}\)
e)E = (5/12 . 17) + (3/34 . 10) + (7/60 . 9) + (8/27 + 35)
f)F = \(\dfrac{5}{12.17}\) + \(\dfrac{3}{34.10}\) + \(\dfrac{7}{60.9}\) + \(\dfrac{8}{27.35}\)