[tex]\bf \colorbox{black}{ \bf{ \textcolor{blue}{tema = } { \bf{ \textcolor{orange}{matematicas = } { \bf{ \textcolor{cyan}{respuesta = }}}}}}}[/tex]
[tex]4x - 5y + 2x + 3y + 3x - 2y = \\ \\ 6x - 2y + 3x - 2y = \\ \\ \bf \textcolor{green}{ \underbrace{9x - 4y}}[/tex]