I would like a cake and some mineral water 

Art is my favourite subject

a)\(\dfrac{2}{3}.\dfrac{5}{4}-\dfrac{3}{4}.\dfrac{2}{3}=\dfrac{2}{3}.\left(\dfrac{5}{4}-\dfrac{3}{4}\right)=\dfrac{2}{3}.\dfrac{1}{2}=\dfrac{1}{3}\)

b) \(2.\left(\dfrac{-3}{2}\right)^2-\dfrac{7}{2}=2.\dfrac{9}{4}-\dfrac{7}{2}=\dfrac{9}{2}-\dfrac{7}{2}=1\)

c)\(-\dfrac{3}{4}.5\dfrac{3}{13}-0.75.\dfrac{36}{13}=\dfrac{3}{4}.-\dfrac{68}{13}-\dfrac{3}{4}.\dfrac{36}{13}=\dfrac{3}{4}.\left(-\dfrac{68}{13}-\dfrac{36}{13}\right)=\dfrac{3}{4}.-8=-6\)