Simplify. Write each answer in standard form.

Question

anonymous · Answer

$$(6s ^{4}+7s ^{2}+7)+(8s ^{4}-11s ^{2}+9s)$$

anonymous · Answer

$$(8z ^{3}-3z ^{2}-7)-(z ^{3}-z ^{2}+9)$$

ranga · Answer

Combine like terms and write them in order from the highest degree to the lowest degree.

anonymous · Answer

So it would be
$$(7s ^{2}+6s ^{4}+7)+(9s+11s ^{2}8s ^{4}$$

anonymous · Answer

?

ranga · Answer

In the following ^ denotes exponent:

(6s^4 + 7s^2 + 7)  +  (8s^4 - 11s^2 + 9s)

Combining like terms means bringing together terms that have the same exponent:
(6s^4 + 8s^4) + (7s^2 - 11s^2) + 9s + 7
14s^4 - 4s^2 + 9s + 7
(notice how it is arranged from highest exponent to the lowest exponent)

anonymous · Answer

And thats all I have to do?

ranga · Answer

Yes.  That is what they mean by simplify.  
Write in "standard form" means writing the expression in order from the highest degree to the lowest degree.

anonymous · Answer

Thank you.

ranga · Answer

you are welcome.