(4 целых 1/3-3 целых 4/9) в квадрате *(2 целых 1/4) в квадрате

[latex](4 \frac{1}{3} -3 \frac{4}{9} )^{2} *( 2 \frac{1}{4}) ^2} =( \frac{13}{3} - \frac{31}{9})^{2} * (\frac{9}{4} )^{2} = ((\frac{13}{3}) ^{2} - 2*\frac{13}{3} * \frac{31}{9} + (\frac{31}{9})^{2} ) * \frac{81}{16} = (\frac{169}{9}-\frac{806}{27} + \frac{961}{81} )* \frac{81}{16} =(\frac{169*9-806*3+961*1}{81})* \frac{81}{16} =(\frac{1521-2418+961}{81}) * \frac{81}{16} = \frac{64}{81} * \frac{81}{16} = \frac{64*81}{81*16} =4[/latex]