S14 = ((2 × 5 + 3 × (14 - 1))/2)×14 = 343
S24 = ((2 × 12 + 7 × (24 - 1))/2)×24=2220
S32 = ((2 × (-55) + 8 × (32-1))/2)×32 = 2208
S19 = ((2 × (-7,3) + 8 × (19-1))/2)×19=1229,3
S14 = ((2 × 5 + 3 × (14 - 1))/2)×14 = 343
S24 = ((2 × 12 + 7 × (24 - 1))/2)×24=2220
S32 = ((2 × (-55) + 8 × (32-1))/2)×32 = 2208
S19 = ((2 × (-7,3) + 8 × (19-1))/2)×19=1229,3