\({2 \over 6x}-{3 \over 6x}=-{1 \over 6x}\)

\({4 \over a}+{6 \over 9a}={36 \over 9a}+{6 \over 9a}={42 \over 9a}={14 \over 3a}\)

\({7 \over 8a}-{5 \over 9b}={63b \over 72ab}-{40a \over 72ab}={63b-40a \over 72ab}\)

\(8-{7 \over 3x}={8 \over 1}-{7 \over 3x}={24x \over 3x}-{7 \over 3x}={24x-7 \over 3x}\)

\(9p+{6 \over 7p}={9p \over 1}⋅{7p \over 7p}+{6 \over 7p}={63p^2 \over 7p}+{6 \over 7p}={63p^2+6 \over 7p}\)

\({9a \over b}+{3 \over 4b}={36a \over 4b}+{3 \over 4b}={36a+3 \over 4b}\)

\({6b \over 9a}+{7a \over 5b}={30b^2 \over 45ab}+{63a^2 \over 45ab}={63a^2+30b^2 \over 45ab}={21a^2+10b^2 \over 15ab}\)

\({7x \over x}={7 \over 1}=7\)

\({x \over 2x}={1 \over 2}\)

\({8p \over 28p}=\frac{2}{7}\)

\({9a \over -3a}=-3\)

\({-12xy \over -16xz}={3y \over 4z}\)

\({20y \over 35xy}={4 \over 7x}\)

\({-10abc \over 2bc}=-5a\)

\({5pq \over q}+{6pr \over r}=5p+6p=11p\)

\({5 \over x}⋅-{3 \over y}=-{15 \over xy}\)

\({x \over 8}⋅-{4 \over y}=-{4x \over 8y}=-{x \over 2y}\)

\(-{7 \over 4}⋅p=-{7p \over 4}\)

\({5 \over a}:{6 \over b}={5 \over a}⋅{b \over 6}={5b \over 6a}\)

\(-{6 \over 5}:a=-{6 \over 5}:{a \over 1}=-{6 \over 5}⋅{1 \over a}=-{6 \over 5a}\)

\({9p \over 8}+{p-1 \over 7}={63p \over 56}+{8(p-1) \over 56}={63p+8(p-1) \over 56}={71p-8 \over 56}\)

\({4b \over a}⋅{a+2 \over 3}={4b(a+2) \over 3a}={4ab+8b \over 3a}\)

\(-{8 \over 5}:{x-9y \over y}=-{8 \over 5}⋅{y \over x-9y}=-{8y \over 5(x-9y)}=-{8y \over 5x-45y}\)

\({3a^2-6a+90 \over 3a}={3a^2 \over 3a}-{6a \over 3a}+{90 \over 3a}=a-2+{30 \over a}\)

\({2x^2+9x-6 \over 4x^2}={2x^2 \over 4x^2}+{9x \over 4x^2}-{6 \over 4x^2}=\frac{1}{2}+{9 \over 4x}-{3 \over 2x^2}\)