a)

$0,75:\frac{1}{3}+1,28:0,04-2\frac{1}{4}\cdot \left(3,5-2\frac{1}{3}\right)+1,65=$  

$=\frac{3}{4}\cdot 3+128:4-\frac{9}{4}\cdot \left(3\frac{1}{2}-2\frac{1}{3}\right)+1,65=$  

$=\frac{9}{4}+32-\frac{9}{4}\cdot \left(3\frac{3}{6}-2\frac{2}{6}\right)+1,65=$  

$=2\frac{1}{4}+32-\frac{9}{4}\cdot 1\frac{1}{6}+1,65=34\frac{1}{4}-\frac{\sout{9}{}^3}{4}\cdot \frac{7}{\sout{6}{}_2}+1,65=34,25-2,625+1,65=31,625+1,65=33,275=$      

b)