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Answer:
[tex]=7x^6-1[/tex]
Step-by-step explanation:
[tex]\mathrm{Apply\:rule}:\quad \left(a\right)=a[/tex]
[tex]\left(\left(14-7\right)x^6\right)=\left(14-7\right)x^6[/tex]
[tex]=\left(14-7\right)x^6-9+2^2-3^2+13[/tex]
[tex]\mathrm{Group\:them:like\:terms}[/tex]
[tex]=\left(14-7\right)x^6-3^2+2^2-9+13[/tex]
[tex]\mathrm{Add\:the\:numbers:}\:-9+13=4[/tex]
[tex]=\left(14-7\right)x^6-3^2+2^2+4[/tex]
[tex]14-7=7[/tex]
[tex]3^2 = 9[/tex] because: [tex]3*3=9[/tex]
[tex]2^2 =4[/tex] [tex]Because : 2*2=4[/tex]
then, [tex]=7x^6-9+4+4[/tex]
[tex]\mathrm{Add\:the\:numbers:}\:-9+4+4=-1[/tex]
then the answer will be [tex]=7x^6-1[/tex]