\[\boxed{\text{806\ (806).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = \left\{ \begin{matrix} - 2x + 1,\ \ x \leq - 2 \\ x^{2},\ \ \ \ \ \ \ \ \ \ - 2 < x < 3 \\ 6,\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x \geq 3\ \\ \end{matrix} \right.\ \]
\[1)\ f( - 3) = - 2 \cdot ( - 3) + 1 =\]
\[= 6 + 1 = 7\]
\[2)\ f( - 2) = - 2 \cdot ( - 2) + 1 =\]
\[= 4 + 1 = 5\]
\[3)\ f(2) = 2² = 4\]
\[4)\ f(3) = 6\]
\[5)\ f(2,9) = {2,9}^{2} = 8,41\]
\[6)\ f(8,1) = 6\]