\(a,=\dfrac{7}{12}\\ b,=\dfrac{1}{4}\cdot\dfrac{7}{4}-\dfrac{1}{4}\cdot\dfrac{3}{4}=\dfrac{1}{4}\left(\dfrac{7}{4}-\dfrac{3}{4}\right)=\dfrac{1}{4}\\ c,=\dfrac{4}{3}-\dfrac{7}{5}=-\dfrac{1}{15}\\ d,=2:\left(-\dfrac{1}{6}\right)^3=2:\left(-\dfrac{1}{216}\right)=-432\\ e,=\dfrac{4}{25}-\dfrac{7}{5}\cdot\dfrac{25}{7}=\dfrac{4}{25}-5=-\dfrac{121}{5}\\ f,=\dfrac{2}{3}-\dfrac{1}{3}=\dfrac{1}{3}\\ g,=\dfrac{4}{3}:\dfrac{3}{4}=\dfrac{16}{9}\\ h,=-\dfrac{17}{6}\cdot\dfrac{6}{5}+\dfrac{7}{5}=-\dfrac{17}{5}+\dfrac{7}{5}=-2\\ i,=\dfrac{1}{4}\cdot\dfrac{16}{11}+\dfrac{1}{2}\cdot\left(-\dfrac{8}{5}\right)=\dfrac{4}{11}-\dfrac{4}{5}=-\dfrac{24}{55}\)
