[tex]3\frac{3}{4} +3\frac{1}{3}*(1\frac{3}{4}+\frac{1}{2} )= 3\frac{3}{4} +3\frac{1}{3}*(1\frac{3}{4}+\frac{2}{4} )=3\frac{3}{4} +3\frac{1}{3}* 1\frac{5}{4} = 3\frac{3}{4} + \frac{10}{\not{3}^1}* \frac{\not{9}^3}{4} =\\\\\\= 3\frac{3}{4}+\frac{30}{4}=3\frac{3}{4}+7\frac{2}{4}=10\frac{5}{4}=11\frac{1}{4}[/tex]
