56-8(1/4+2/1-3/5)

56 -8[(5 +40 -12)/20]

56 -8(33/20)

56 -66/5

(280 - 66)/5

114/5

22.8//

just a little mistake Sasini

280-66=214

$${\mathtt{56}}{\mathtt{\,-\,}}{\mathtt{8}}{\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{4}}}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{2}}}{{\mathtt{1}}}}{\mathtt{\,-\,}}{\frac{{\mathtt{3}}}{{\mathtt{5}}}}\right) = {\frac{{\mathtt{214}}}{{\mathtt{5}}}} = {\mathtt{42.8}}$$