[tex]\huge\text{Hey there!}[/tex]
[tex]\large\boxed{\rm{\dfrac{ab^2 - 4}{10}}}[/tex]
[tex]\large\boxed{\rm{\rightarrow\dfrac{\bold{4(6)}^2 -4}{10}}}[/tex]
[tex]\large\boxed{\rm{6^2}}[/tex]
[tex]\large\boxed{\rm{= 6 \times6}}[/tex]
[tex]\large\boxed{\rm{= \bf 36}}[/tex]
[tex]\large\boxed{\rm{\rightarrow\dfrac{4(\bold{36)}- 4}{10}}}}[/tex]
[tex]\large\boxed{\rm{4(36)}}[/tex]
[tex]\large\boxed{\rm{= \bf 144}}}[/tex]
[tex]\large\boxed{\rm{\rightarrow\dfrac{\bold{144} - 4}{10}}}[/tex]
[tex]\large\boxed{\rm{\bold{144} - 4}}[/tex]
[tex]\large\boxed{= \rm{\bf 140}}}[/tex]
[tex]\large\boxed{\rm{\rightarrow\dfrac{\bold{140}}{10}}}[/tex]
[tex]\large\boxed{\rm{= \bf 14}}[/tex]
[tex]\huge\boxed{\rm{Therefore, your\ answer\ is: \mathsf{14}}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
