(2⁴ * 3³ : 54 +7²) :3 -4² =
= ( 2*2³*3³ : (2*27) + 7²) : 3 - 4² =
= ((2*3³*2³) : (2*3³) +7*7) : 3 - 4*4=
= (2³ + 49):3 - 16=
= (8 +49) :3 - 16=
= 57:3 -16 =
= 19-16=
= 3
(2⁵+19) :3 -5²*3³ : 45 =
= (2*2*2*2*2 + 19) : 3 - 5²*3² : (5*9) =
= (32 +19) : 3 - (5*3²* 5*3) : (5*3²) =
= 51:3 - 15 =
= 17 - 15=
= 2