I see the image contains five mathematical expressions (problems 16–20). Let's solve them one by one:

16. $\left( \frac{12 - 18}{3 - 5} \right) \times (-4)$

1. $12 - 18 = -6$
2. $3 - 5 = -2$
3. $\frac{-6}{-2} = 3$
4. $3 \times (-4) = -12$

Solution for 16: $-12$

17. $(2^4 - 24) - \left( \sqrt{36} \right) \div (-2)$

1. $2^4 = 16$
2. $16 - 24 = -8$
3. $\sqrt{36} = 6$
4. $6 \div (-2) = -3$
5. $-8 - (-3) = -8 + 3 = -5$

Solution for 17: $-5$

18. $-3^2 + \sqrt{144} - (-2)^5 + \sqrt[3]{-64}$

1. $-3^2 = -9$ (Exponent takes precedence)
2. $\sqrt{144} = 12$
3. $(-2)^5 = -32$
4. $\sqrt[3]{-64} = -4$
5. $-9 + 12 - (-32) + (-4)$
6. $-9 + 12 + 32 - 4 = 31$

Solution for 18: $31$

19. {\left[(-15 + 5) \times 2 + 8\right] - \frac{32}{8}} - (-7)

1. $-15 + 5 = -10$
2. $-10 \times 2 = -20$
3. $-20 + 8 = -12$
4. $\frac{32}{8} = 4$
5. $-12 - 4 = -16$
6. $-16 - (-7) = -16 + 7 = -9$

Solution for 19: $-9$

20. $(5 - 2)^3 \times 2 + \left[-4 + (-7)\right] \div (-2 + 4)^2$

1. $5 - 2 = 3$
2. $3^3 = 27$
3. $27 \times 2 = 54$
4. $-4 + (-7) = -11$
5. $-2 + 4 = 2$
6. $2^2 = 4$
7. $-11 \div 4 = -\frac{11}{4} = -2.75$
8. $54 + (-2.75) = 51.25$

Solution for 20: $51.25$

Do you want more details on any of these steps, or have any further questions?

Here are 5 related problems you can try:

1. Simplify $\frac{16 - 9}{3 - 7} \times (-5)$
2. Solve $(3^2 - 5) - \left( \sqrt{81} \right) \div (-3)$
3. Simplify $-4^2 + \sqrt{100} - (-3)^4$
4. Solve $\{(2 - 12) \times 5 + 10\} - \frac{50}{5}$
5. Solve $(7 - 1)^2 \times 2 + [-3 + (-9)] \div (-3 + 5)^2$

Tip: Always apply the order of operations (PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) carefully when simplifying complex expressions.