Верхний фрагмент страницы: 1) (5m − n)/(14m) − (m − 6n)/(7m); 2) (a + b)/(ab) + (a − c)/(ac); 3) (k + 4)/k − (3k − 4)/k²; 4) (x − y)/x³ − (y − x²)/(x²y); 5) (2m − 3n)/(m²n) + (m − 2n)/(mn²); 6) (c + d)/(cd⁴) − (c² − 8d)/(c³d³).

Приводим к общему знаменателю: \(\dfrac{5m-n-2(m-6n)}{14m}=\dfrac{3m+11n}{14m}\).

\(\dfrac{c(a+b)+b(a-c)}{abc}=\dfrac{a(b+c)}{abc}=\dfrac{b+c}{bc}\).

\(\dfrac{k(k+4)-(3k-4)}{k^2}=\dfrac{k^2+k+4}{k^2}\).

\(\dfrac{y(x-y)-x(y-x^2)}{x^3y}=\dfrac{x^3-y^2}{x^3y}\).

\(\dfrac{n(2m-3n)+m(m-2n)}{m^2n^2}=\dfrac{m^2-3n^2}{m^2n^2}\).

\(\dfrac{c^2(c+d)-d(c^2-8d)}{c^3d^4}=\dfrac{c^3+8d^2}{c^3d^4}\).