Помогите пожалуйста, срочно! С решением нужно

г)-x(5−y)− y(x+5)

д) −a(12−b)−b(a+18)

е)−7(−4x+3)+2(3x −7)

ж) 9(8–7a)–8(6a−9)

з) 4,5(–8y-7)–3,9(6–9y)​
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