Evaluate each expression. See Example 5. 10 + 30 ÷ 2 • 3

Evaluate each expression. See Example 5. 5 - 7 • 3 - (-2)³

Evaluate each expression. See Example 5. 18 - 4² + 5 - (3 - 7)

Evaluate each expression. See Example 5. -4(9 - 8) + (-7) (2)³

Evaluate each expression for p = -4, q = 8, and r = -10. See Example 6. 3p - 2r

Evaluate each expression for p = -4, q = 8, and r = -10. See Example 6. -p² - 7q + r

Evaluate each expression for p = -4, q = 8, and r = -10. See Example 6. (q + r)/ (q + p)

Evaluate each expression for p = -4, q = 8, and r = -10. See Example 6. 5r/(2p - 3r)