[tex][x@(x@8)]^2-[x@(x@6)]^2=[/tex]
[tex][x@\frac{x+8}{2}]^2-[x@\frac{x+6}{2}]^2=[/tex]
[tex][\frac{x+\frac{x+8}{2}}{2}]^2-[\frac{x+\frac{x+6}{2}}{2}]^2=[/tex]
[tex][\frac{\frac{2x+x+8}{2}}{2}]^2-[\frac{\frac{2x+x+6}{2}}{2}]^2=[/tex]
[tex][\frac{\frac{3x+8}{2}}{2}]^2-[\frac{\frac{3x+6}{2}}{2}]^2=[/tex]
[tex][\frac{3x+8}{4}]^2-[\frac{3x+6}{4}]^2=[/tex]
[tex]\frac{9x^2+48x+64}{16}-\frac{9x^2+36x+36}{16}=[/tex]
[tex]\frac{9x^2+48x+64-9x^2-36x-36}{16}=[/tex]
[tex]\frac{12x + 28}{16}=\frac{4(3x + 7)}{16}=\frac{3x +7 }{4}[/tex]
