A) 5⁶*6⁴*5³*(2⁵)²*(3⁹:3³)/10⁵*25⁰*(3/5)³*15⁷*2⁸=
=5⁹*2⁴*3⁴*2¹⁰*3⁶/5⁵*2⁵*1*3³*5⁻³*5⁷*3⁷*2⁸=5⁹*2¹⁴*3¹⁰/5⁹*2¹³*3¹⁰=
=5⁹⁻⁹*2¹⁴⁻¹³*3¹⁰⁻¹⁰*1=5⁰*2*3⁰*1=2
б)77⁴*11³*(2:7)²*28³/(4⁶:2⁴)*7⁶*16⁰*(11²)⁵*(7/11)³=
=11⁴*7⁴*11³*2²:7²*(2²)³*7³/(2²)⁶:2⁴*7⁶*1*11¹⁰*7³*11⁻³=
=11⁷*7⁵*2⁸/2⁸*7⁹*11⁷*1=11⁷⁻⁷*7⁵⁻⁹*2⁸⁻⁸*1=11⁰*7⁻⁴*2⁰*1=1/7⁴=1/2401