10)
![10^2-48:6+25*3=100-8+75=167](https://img.qammunity.org/2021/formulas/mathematics/middle-school/84r9g134tvppvon1e1bbj9am7bwrtxuz9v.png)
11)
![8((16)/(4) )+2^2-11*3=32+4-33=3](https://img.qammunity.org/2021/formulas/mathematics/middle-school/mhvwjsua0lm5s1dtp6yc8dhepqnhhfa0sb.png)
12)
![((6)/(3) +4)^2:4*7=(2+4)^2:4*7=6^2:4*7=36:4*7=9*7=63](https://img.qammunity.org/2021/formulas/mathematics/middle-school/z6msrmxjqxuwt2h7n0zryiazrflbgniw55.png)
13) (your answer is incorrect)
![5(9-4)^2-3^2=5*5^2-3^2=5*25-9=125-9=116](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ay8bue128exepbu2as57azn9wcil1iv4c1.png)
14) (your answer is incorrect)
![5^2-2^2*4^2-12=25-4*16-12=25-64-12=-51](https://img.qammunity.org/2021/formulas/mathematics/middle-school/2dsn6yiljsen9nidohzoqvgiuwoidabeal.png)
15)
![((50)/(5^2) )^2:4=((50)/(25) )^2:4=2^2:4=4:4=1](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ycskoy4elar5s5ed5pbpj5fjq04wgk1f55.png)
16)
-expression to represent this situation
![(24+32+30+28)/(2)=(114)/(2)=57](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ib2qufc4469t7wmrtoqtg8vubl5g1a1gct.png)
Answer: In 1 group 57 students
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P.S. Hello from Russia :^)