11. How much is y4 – 12y2 + y + 14 greater than 17y3 + 34y2 – 51y + 68?
12. How much does 93 p2 – 55p + 4 exceed 13p3 – 5p2 + 17p - 90?
13. What should be taken away from 3x2 – 4y2 + 5xy + 20 to obtain – x2 - y2 + 6xy+20
please help fast
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