Write a numerical expression for the phrase and simplify. See Examples 1 and 2.
Four-fifths of the sum of −8 and −2
EXAMPLE 1 Translating Words and Phrases (Multiplication)
Write a numerical expression for each phrase, and simplify the expression.

EXAMPLE 2 Translating Words and Phrases (Division)
Write a numerical expression for each phrase, and simplify the expression.

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