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Verified answer
1. 5y-3x-4-(5x-3y+7)=5y-3x-4-5x+3y-7=8y-8x-112. (2x-3)(x+5)=2x²+10x-3x-15=2x²+7x-15
3. 4x²+16x+15 /(2x+5) =(2x+5)(2x+3)/(2x+5)=2x+3
= 2x²+10-3x-15
=2x²-3x+10-15
=2x²-3x-5
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