Помогите решить примеры! (дам 30 баллов)

1) (4,9+9,17-14,35)*1/7=
2) (0,81+1,89-137,7)*1/9=
3) 2m(2 степень)-1/2n при m=9 n=44
4) 4x(2 степень)+1/3y при x=7, y=42
5) 3,5(m-n) при m=2,7 n= -9,3
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