#### Answer

$\frac{-65b-44a}{40ab}$

#### Work Step by Step

To simplify this expression, we first need to find the common denominator (the LCM), which is $40ab$. Therefore, we obtain:
$-\frac{13}{8a}-\frac{11}{10b}$
=$\frac{-13(5b)-11(4a)}{40ab}$
=$\frac{-65b-44a}{40ab}$