\({2 \over 4x}-{5 \over 4x}=-{3 \over 4x}\)

\({6 \over a}+{8 \over 3a}={18 \over 3a}+{8 \over 3a}={26 \over 3a}\)

\({2 \over 9p}+{8 \over 6q}={4q \over 18pq}+{24p \over 18pq}={4q+24p \over 18pq}={2q+12p \over 9pq}\)

\(9-{5 \over 2a}={9 \over 1}-{5 \over 2a}={18a \over 2a}-{5 \over 2a}={18a-5 \over 2a}\)

\({4x \over y}+{2 \over 6y}={24x \over 6y}+{2 \over 6y}={24x+2 \over 6y}={12x+1 \over 3y}\)

\({9x \over x}={9 \over 1}=9\)

\({p \over 9p}={1 \over 9}\)

\({10a \over -35a}=-\frac{2}{7}\)

\({-32a \over 4a}=-8\)

\({-40xy \over -45xz}={8y \over 9z}\)

\({15q \over -27pq}=-{5 \over 9p}\)

\({18abc \over -3bc}=-6a\)

\({6ab \over b}+{3ac \over c}=6a+3a=9a\)