${\displaystyle {\begin{array}{r}75{\color {red}3}\\{\underset {}{-49{\color {red}1}}}\\\hline \color {Gray}2\end{array}}}$

In your article, replace the image with:

<math>\begin{array}{r}
 75{\color{red}3}\\
 \underset{}{-49{\color{red}1} }\\
 \hline
 \color{Gray}2
\end{array}</math>

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