please help me thankyou

DECODER:
[tex] \frac{2}{k + 1} [/tex]
[tex]25k ^{2} [/tex]
[tex] \frac{k - 6}{k - 7} [/tex]
[tex] - 12[/tex]
[tex] \frac{1}{4(k + 2)} [/tex]
[tex] \frac{ - 1}{2} [/tex]
[tex]12[/tex]
[tex] \frac{1}{2} [/tex]
[tex] \frac{2k}{k + 2} [/tex]
[tex] \frac{2}{k + 1} [/tex]
[tex] - 12[/tex]
[tex] \frac{k - 6}{k - 7} [/tex]
[tex] \frac{1}{k} [/tex]
[tex] \frac{5}{2} [/tex]
Hope It's Help