Упростите выражение:
[tex] \frac{a+4}{ a^{2}-6a+9 } [/tex]÷[tex] \frac{a^{2}-16 }{2a-6} [/tex]-[tex] \frac{2}{a-4} [/tex]
[tex] \frac{a+4}{ a^{2}-6a+9 } [/tex]÷[tex] \frac{a^{2}-16 }{2a-6} [/tex]-[tex] \frac{2}{a-4} [/tex]
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