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Evaluate Numerical Expressions Involving Integers

Evaluate: -(-x) - (-y) if x = 3 and y = - 4

Evaluate: 11 + (-xy) if x = - 7 and y = 4

Evaluate: y - x ÷ 10 if x = 100 and y = 10

Evaluate: - 4x ÷ 3y if x = 15 and y = - 2

Evaluate: 10x + (-y) if x = - 5 and y = 2

Evaluate: 12 - x + y if x = 6 and y = 8

Evaluate: 2x + 2y if x = 2 and y = 2

Evaluate: -5y (x + y) if x = 4 and y = 2

Evaluate: 75 + xy if x = 9 and y = 5

Evaluate: 9x - xy if x = 6 and y = 3