Answer with Explanation: We have to simplify the polynomials (1) to (5) one by one, the simplification is shown as follows, step by step:
Simplification for (1):
[tex](1)\rightarrow5xy+7xy\Rightarrow(5+7)xy\Rightarrow12xy[/tex]Simplification for (2):
[tex](2)\rightarrow4z^4-2z+z+1-5\Rightarrow4z^4-z-4[/tex]Simplification for (3):
[tex](3)\rightarrow8p^6-2p^6-3p+4p+6\Rightarrow6p^6+p+6[/tex]Simplification for (4):
[tex]\begin{gathered} (4)\rightarrow(12ab-3bc)-(13ab+4bc)\Rightarrow12ab-3bc-13ab-4bc\Rightarrow-ab-7bc \\ \end{gathered}[/tex]Simplification for (5):
[tex](5)\rightarrow(x^5-5x+1)-(x^5-6x+2)\Rightarrow x^5-5x+1-x^5+6x-2\Rightarrow x-1[/tex]