a) [(-9)⁵⁴ : 3¹⁰⁶ - 27⁵³ : 9⁷⁹]⁷: (-3)³=
=[(-3)¹⁰⁸ : 3¹⁰⁶ - 3¹⁵⁹ : 3¹⁵⁸]⁷: (-3)³=
=[(-3)² - 3]⁷: (-3)³=
=(9 - 3)⁷: (-3)³=
=6⁷: (-3)³=
=6⁴×6³: (-3)³=
=6⁴×(-2³)
=10368
b) 2¹⁰⁰⁰ : [(-2)⁴⁰ • 2⁵⁸ - (2¹⁰• 2³)⁷ • 2⁷ + (3⁷⁴ : 3⁷³ - 1)]=
=2¹⁰⁰⁰ : [2⁹⁸ - (2¹³)⁷ • 2⁷ + (3 - 1)]=
=2¹⁰⁰⁰ : (2⁹⁸ - 2⁹¹ • 2⁷ + 2)=
=2¹⁰⁰⁰ : (2⁹⁸ - 2⁹⁸ + 2)=
=2¹⁰⁰⁰ : 2= 2⁹⁹⁹