Evaluate the following expressions: a) (-23) + 5 - 6, d) 250 - 40 + (-57), g) 45 -10 / 5. Work out: a) 14 / -2 10 - 20 + 11, c) 75 - 16 * 24 / 3 + 12, e) (10 + 12) - 40 / 4 + 16

$$-18 - 6 = -24$$

The result is $\boxed{-24}$.

d) $250 - 40 + (-57)$

$$210 - 57 = 153$$

The result is $\boxed{153}$.

g) $45 \times -10 \div 5$

$$-450 \div 5 = -90$$

The result is $\boxed{-90}$.

2. Work out:

a) $14 \div -2 \times 10 - 20 + 11$

$$-90 + 11 = -79$$

The result is $\boxed{-79}$.

c) $75 - 16 \times 24 \div 3 + 12$

$$-53 + 12 = -41$$

The result is $\boxed{-41}$.

e) $(10 + 12) - 40 \div 4 + 16$

$$12 + 16 = 28$$

The result is $\boxed{28}$.

g) $28 \div 7 \times (15 - 22) + 56 - 30$

$$28 - 30 = -2$$

The result is $\boxed{-2}$.