Csdrhrt

I am trying to receive this look of fractions

I need the red numbers, which are over the fractions.
*They need to be normal, not handwritten-like.
Here is my code

documentclass[10pt,oneside,a5paper]{article}

usepackage{amsmath}

begin{document}

    $dfrac{13}{25}, dfrac{9}{20}, dfrac{3}{4},

    dfrac{3}{4}, dfrac{3}{5}, dfrac{1}{6};$

end{document}

Why take the risk of an error in computing ?

documentclass{article}

usepackage{amsmath}

usepackage{xintgcd}



newsaveboxmybox

newcommand{fractionswithlcm}[1]{%

  sboxmybox{gdefsimeondenominators{}%

      deffracm##1##2{xdefsimeondenominators{simeondenominators{##2}}}%

      $#1$}%

  edefsimeonlcm{xintLCMof{simeondenominators}}%

  {underbrace{#1}_{displaystylesimeonlcm}}%

}

newcommand{fracm}[2]{%

  overset{xintiiQuo{simeonlcm}{#2}}%

          {overset{displaystylesmile}{frac{#1}{#2}}}%

}



begin{document}



[

fractionswithlcm{

  fracm{13}{25},

  fracm{9}{20},

  fracm{3}{4},

  fracm{3}{5},

  fracm{1}{6}

}

]



end{document}

As per OP request in a comment, here is with only the numbers on top but not anymore the big underbrace.

documentclass{article}

usepackage{amsmath}

usepackage{xintgcd}



newsaveboxmybox

newcommand{fractionswithlcm}[1]{%

  sboxmybox{gdefsimeondenominators{}%

      deffracm##1##2{xdefsimeondenominators{simeondenominators{##2}}}%

      $#1$}%

  edefsimeonlcm{xintLCMof{simeondenominators}}%

  #1%

}

newcommand{fracm}[2]{%

  overset{xintiiQuo{simeonlcm}{#2}}%

          {overset{displaystylesmile}{frac{#1}{#2}}}%

}



begin{document}



[

fractionswithlcm{

  fracm{13}{25},

  fracm{9}{20},

  fracm{3}{4},

  fracm{3}{5},

  fracm{1}{6}

}

]



end{document}

For the curved symbol you can use smile:

documentclass{article}

usepackage{amsmath}



newcommand{fractionswithlcm}[2]{%

  {underbrace{#1}_{displaystyle#2}}%

}

newcommand{fracm}[3]{%

  overset{#1}{overset{displaystylesmile}{frac{#2}{#3}}}%

}



begin{document}



[

fractionswithlcm{

  fracm{12}{13}{25},

  fracm{15}{9}{20},

  fracm{75}{3}{4},

  fracm{60}{3}{5},

  fracm{50}{1}{6}

}{300}

]



end{document}

With widehat instead of curves:

documentclass{article}

usepackage{amsmath}

begin{document}

$overset{underbrace{

underset{widehat{dfrac{13}{25},}}{12}

underset{widehat{dfrac{9}{20}},}{15}

underset{widehat{dfrac{3}{4}}, }{75}

underset{widehat{dfrac{1}{6}}, }{60}

underset{widehat{dfrac{3}{5}} }{50}

}}{300}$

end{document}

Edit: Ok, with curves

documentclass{article}

usepackage{amsmath}

% https://tex.stackexchange.com/a/191042/11604

makeatletter

defwidebreve#1{mathop{vbox{m@thialign{##crcrnoalign{kern3p@}%

      brevefillcrcrnoalign{kern3p@nointerlineskip}%

      $hfildisplaystyle{#1}hfil$crcr}}}limits}



defbrevefill{$m@th setboxz@hbox{$braceld$}%

  braceluleadersvrule @heighthtz@ @depthz@hfillbraceru$}

makeatletter



begin{document}

$overset{underbrace{

underset{widebreve{dfrac{13}{makebox[1em]{25}}},}{12}

underset{widebreve{dfrac{9}{makebox[1em]{20}}},}{15}

underset{widebreve{dfrac{3}{makebox[1em]{4}}},}{75}

underset{widebreve{dfrac{1}{makebox[1em]{6}}},}{60}

underset{widebreve{dfrac{3}{makebox[1em]{5}}}}{50}

}}{300}$

end{document}

What about this?

documentclass[10pt,oneside,a5paper]{article}

usepackage{amsmath}

newcommand{myfrac}[3]{overset{#1}{dfrac{#2}{#3}}}



begin{document}

$myfrac{12}{13}{25}, myfrac{15}{9}{20}, myfrac{75}{3}{4}, myfrac{60}{3}{5}, myfrac{50}{1}{6}$

end{document}