Answer:
3x-7y-\left(-2x\right)-y\cdot \:5x+8y\cdot \:5x-8yx-8yx-8y=19xy+5x-15y
Explanation:
the first one is 14xy+3x-y
the second one nothing can be done so that would be ur answer
the third one nothing can be done so that would be ur answer
the fourth one and the fifth one nothing can be done so that would be ur answer
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