Ответ:
fresh air in nature. there are no cars and sources of harmful gases. in nature you calm down from all this fuss
1=3⁰
3=3¹
9=3²
27=3³
81=3⁴
1/3=3⁻¹
1/9=3⁻²
1/27=3⁻³
1/81=3⁻⁴