Question

$$\frac{2}{3}a-\frac{4}{5}b+\frac{3}{5}c,-\frac{3}{4}a-\frac{5}{2}b+\frac{2}{3}c,\frac{5}{2}a+\frac{7}{4}b-\frac{5}{6}c$$

Evaluate

$\frac{2a}{3}+\frac{3c}{5}-\frac{4b}{5},\frac{2c}{3}-\frac{3a}{4}-\frac{5b}{2},\frac{5a}{2}+\frac{7b}{4}-\frac{5c}{6}$