To simplify the expression (-5/11:13/8-5/11:13/5)+-1/33, we need to find a common denominator for the fractions involved.

The common denominator for 8 and 5 is 40, so we can rewrite the expression as:

(-5/11:13/40 - 5/11:13/40) + (-1/33)

Now, we can combine the fractions:

((-5/11 - 5/11):13/40) + (-1/33)

To combine the fractions, we need to find a common denominator for 11 and 33, which is 363. So, we can rewrite the expression as:

((-5/11 - 5/11):13/40) + (-1/33:363/363)

Now, we can combine the fractions:

((-10/11):13/40) + (-1/33:363/363)

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction:

((-10/11) * (40/13)) + (-1/33 * (363/363))

Simplifying:

(-400/143) + (-1/33)

To add these fractions, we need a common denominator, which is 4719. So, we can rewrite the expression as:

((-400/143) * (4719/4719)) + (-1/33 * (143/143))

Simplifying:

(-400 * 4719) / (143 * 4719) + (-1 * 143) / (33 * 143)

(-1887600 + (-143)) / (4719 * 143)

(-1887743) / (676617)

Therefore, the simplified expression is -1887743/676617.