Thực hiện phép tính sao cho nhanh nhất
a,\(1\frac{1}{5}.0,75-\frac{6}{7}.1\frac{1}{3}+\frac{6}{7}\) b, \(2017.2018.\left(\frac{2016}{2017}-\frac{2016}{2018}\right)\)
c,\(\left(\frac{1}{2}-1\right)\left(\frac{1}{3}-1\right)\left(\frac{1}{4}-1\right).......\left(\frac{1}{100}-1\right)\) d,\(\frac{1023}{2^1+2^2+......2^{10}}\)