\[\boxed{\text{813\ (813).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(3,7) = \lbrack 3,7\rbrack = 3\ \]
\[f(0) = \lbrack 0\rbrack = 0\]
\[f(0,64) = \lbrack 0,64\rbrack = 0\]
\[f( - 0,35) = \lbrack - 0,35\rbrack = - 1\]
\[f(2) = \lbrack 2\rbrack = 2\ \]
\[f( - 2,8) = \lbrack - 2,8\rbrack = - 3\]
\[\boxed{\text{813.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ (x - 2)\left( x^{2} + 2x + 4 \right) =\]
\[= x³ - 8\]
\[2)\ (2a - 1)\left( 4a^{2} + 2a + 1 \right) =\]
\[= 8a³ - 1\]
\[3)\ \left( a^{2} + 1 \right)\left( a^{4} - a^{2} + 1 \right) =\]
\[= a^{6} + 1\]
\[4)\ (0,5xy + 2)\left( 0,25x^{2}y^{2} - xy + 4 \right) =\]
\[= 0,125x³y³ + 8\]