answer fast its urgent
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= (y2/3-4y/7+5)-(2y/7-2y2/3+2)-(y/7-3+2y)
= (7y2-12y+105/21)-(6y-14y2+42/21)-(y-21+14y2)
= 7y2-12y+105/21-6y+14y2-42/21-y+21-14y2/7
= 7y2-12y+105-6y+14y2-42/21-y+21-14y2/7
= 21y2-18y+63/21-y+21-14y2/7
= 21y2-18y+63-3y+63-42y2/21
= -21y2-21y+126/21
Step-by-step explanation:
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