(28 × 5 + 30) : 10 [25 × (39 - 19 × 2)]
=> (140 + 30) : 10 [25 × (39 - 38)]
=> 170 : 10 × (25 × 1) *din paranteza patrata, transformi in paranteza rotunda*
=> 17 × 25
=> 425
