(4/5)в степени -2= (5/4)^2=5^2/4^2=25/16
(1/27)в степени 1/3=((1\3) ^ 3)в степени 1/3=1/3^(3*1/3)=(1/3)^1=1/3
25\16-1\3=(75-16)\(3*16)=59\48
![=(\frac{5}{4})^2-\sqrt[3]{\frac{1}{27} }=\frac{25}{16}-\frac{1}{3}=\frac{75-16}{48}=\frac{59}{48}=1\frac{11}{48}](/tpl/images/0028/3738/9b51a.png)
