Tính biết

A)5/25+7/17+0,25-5/23+10/17
B)3/7×2^2/3-3/7×1^1/2
C)13^1/4×(-4/7)-17^1/4÷(-4/7)
D)100/123÷(3/4+7/12)+23/123÷(9/5-7/15)