[tex]\huge\text{Hey there!}\\\\\large\text{a - 9b}\\\large\text{= -4 - 9(7)}\\\large\text{= -4 - 63}\\\large\text{= -67}\\\\\large\boxed{\rm{Therefore, your\ answer: -67}}\huge\checkmark\\\\\\\large\text{Good luck on your assignment and enjoy your day!}}\\\\\frak{Amphitrite1040:)}[/tex]
