[tex]c)\\\\1\frac{1}{4}*6-3:1\frac{1}{5}=\frac{5}{\not{4}^2}*\not{6}^3-3: \frac{6}{5}= \frac{15}{2}-\not{3}^1*\frac{5}{\not{6}^2}=\frac{15}{2}-\frac{5}{2}=\frac{10}{2}=5[/tex]
