Question

Решите,помогите!!!!!!!!!!! 

Answer 1

а)(3/4-5/6)•1 5/7=(9/12-10/12)•12/7=(-1/12)•12/7=
=-1/7
б)(3,74-5,74)^2=(-2)^2=4
в) |3+|27-|75=|3+3|3-5|3=-|3
г)2^6•2^3 /(2^4)^2=2^9 /2^8=2