Помогите пожалуйста решить)
1.) 1 4/21 : 5/7 - 2/5 * 5/2
2.) (3 5/6-2 3/4):7/12+5 1/2
1.) 1 4/21 : 5/7 - 2/5 * 5/2
2.) (3 5/6-2 3/4):7/12+5 1/2
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2)(3 5/6-2 3/4):7/12+5 1/2=1:7/12+5/2=12/7+5/2=59/14