Răspuns:
15²-5•[(5⁷)⁸:5³⁰+5•5²¹-5²⁰]:25¹⁰=
=15²-5•(5⁵⁶:5³⁰+5•5²¹-5²⁰):25¹⁰=
=15²-5•(5⁵⁶`³⁰+5•5²¹`²⁰):25¹⁰=
=15²-5•(5²⁶+5•5¹):25¹⁰=
=15²-5•(5²⁰+5²):25¹⁰=
=15²-5•5²²:25¹⁰=
=15²-5•5²²:(5²)¹⁰=
=15²-5•5²²:5²⁰=
=15²-5•5²²`²⁰=
=15²-5•5²=
=15²-5³=
=225-125=
=100
` =minus la puteri
