\({2 \over 7a}-{6 \over 7a}=-{4 \over 7a}\)

\({6 \over p}-{9 \over 4p}={24 \over 4p}-{9 \over 4p}={15 \over 4p}\)

\({4 \over 9x}+{8 \over 3y}={4y \over 9xy}+{24x \over 9xy}={4y+24x \over 9xy}\)

\(2-{5 \over 6x}={2 \over 1}-{5 \over 6x}={12x \over 6x}-{5 \over 6x}={12x-5 \over 6x}\)

\({4a \over b}-{8 \over 5b}={20a \over 5b}-{8 \over 5b}={20a-8 \over 5b}\)

\({8a \over a}={8 \over 1}=8\)

\({a \over 8a}={1 \over 8}\)

\({12x \over 32x}=\frac{3}{8}\)

\({35p \over -5p}=-7\)

\({15xy \over 35xz}={3y \over 7z}\)

\({10q \over 18pq}={5 \over 9p}\)

\({-8abc \over 2bc}=-4a\)

\({6xy \over y}+{5xz \over z}=6x+5x=11x\)