a) -5 - 3(-3) - 11

First, we need to simplify the expression inside the parentheses:

-5 - 3(-3) - 11
-5 + 9 - 11

Next, we can combine like terms:

-5 + 9 - 11
4 - 11

Finally, we can subtract:

4 - 11 = -7

Therefore, the value of the expression is -7.

b) (-14):2 - 7 - 12

First, we need to perform the division:

(-14):2 - 7 - 12
-7 - 7 - 12

Next, we can combine like terms:

-7 - 7 - 12
-14 - 12

Finally, we can subtract:

-14 - 12 = -26

Therefore, the value of the expression is -26.