(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]