f: \(=\dfrac{3}{4}-\dfrac{43}{80}:\left(\dfrac{-4}{5}+\dfrac{5}{2}\cdot\dfrac{3}{4}\right)\)
\(=\dfrac{3}{4}-\dfrac{43}{80}\cdot\dfrac{40}{43}=\dfrac{3}{4}-\dfrac{1}{2}=\dfrac{1}{4}\)
i: \(=\dfrac{2}{7}+\dfrac{3}{11}+\dfrac{5}{7}+\dfrac{1}{4}-\dfrac{6}{11}=\dfrac{3}{4}-\dfrac{3}{11}=\dfrac{21}{44}\)
k: =9/17(3/7+4/7)-1
=9/17-1
=-8/17
m: =-5/7(2/11+9/11)+1+5/7
=1
