[tex]\huge{\color{pink}{\underline{\color{pink} {\underline{\color{lavenderblush} {\textbf{\textsf{\colorbox{pink}{Answer:-}}}}}}}}}[/tex]

x+y=y+x

=-1/21+5/14

=-2+15/42

= 13/42

and,

y+x=x+y

= 5/14-1/21

= 15+(-2)/42

= 13/42

you are genius bro you should know it