Ответ:

6. a) x•(x-y)• y/x

(x-y)y=xy-y²

б) a/b²•b•(a+b)/3

a/b•a+b/3

a•(a+b)/3b

a²•ab/3b

в) -(n-m)•2/m•(n-m)

-1•2/m

-2/m

7. а) x³•(x²+1)/x⁶•x³•(x³-1)/x⁶

x²+1/x³•x³-1/x³

[tex] \frac{(x {}^{2} + 1)(x {}^{3} - 1}{x {}^{6} } [/tex]

[tex] \frac{x {}^{5} + x {}^{3} - x {}^{2} - 1}{x {}^{6} } [/tex]

б)

[tex] \frac{m {}^{3} \times (m {}^{2} + m + 1)}{ {m}^{2} } \times \frac{ {m}^{3} \times ( {m}^{2} + 1}{ {m}^{9} } [/tex]

[tex] \frac{ {m}^{2} + m + 1}{ {m}^{2} } + \times \frac{ {m}^{2} + 1}{ {m}^{2} } [/tex]

[tex] \frac{( {m}^{2} + m + 1) \times ( {m}^{2} + 1)}{ {m}^{2} } [/tex]

[tex] \frac{ {m}^{4} + {m}^{2} + {m}^{3} + m + {m}^{2} + 1}{ {m}^{8} } [/tex]

[tex] \frac{ {m}^{4} + {m}^{3} + 2 {m}^{2} + m + 1}{ {m}^{8} } [/tex]