`a) A = 3\frac{1}{7} - ( 5.0,05 + \frac{22}{7}) - ( 4 + 0,75)`
`A = \frac{22}{7} - ( \frac{1}{4} + \frac{22}{7} ) - ( 4 + \frac{3}{4} )`
`A = \frac{22}{7} - \frac{1}{4} - \frac{22}{7} - \frac{19}{4}`
`A = -5`
`b)` `B = \frac{(-1)^{2018} . (\frac{2}{5})^{3} . (\frac{15}{4})^{2} }{\frac{15^{2}}{4^{4}}. (\frac{2}{5}^{3})}`
`B = \frac{ 1 . (\frac{2}{5})^{3} . \frac{15^{2}}{4^{2}}}{\frac{15^{2}}{4^{4}}. (\frac{2}{5}^{3})}`
`B = \frac{1}{4^{2}}`
`B = \frac{1}{16}`
