add:
(2c^4-2c^3+3c^2+13c-5)+(c^5+10c^3+6c^2-3c+2)+(-5c^4+c^2-7c-9) Answer is...I have no clue!

Question

anonymous · Answer

combine like terms so look for all the terms of degree 5 first

immanuelv · Answer

c^5-3 c^4+8 c^3+10 c^2+3 c-12 
is the answer!

anonymous · Answer

there is only one of them, it is $$c^5$$

immanuelv · Answer

$$-12 + 3 c + 10 c^2 + 8 c^3 - 3 c^4 + c^5$$

anonymous · Answer

now look for all the terms of degree 4.  there are $$2c^4$$ and $$-5c^4$$ and $$2c^4-5c^4=-3c^4$$

amistre64 · Answer

(       2c^4-2c^3  +3c^2+13c -5)+
(c^5         +10c^3+6c^2 -3c  +2)+
(      -5c^4             +c^2  -7c  -9) 
-------------------------------
c^5 -3c^4 +8c^3 +10c^2 +3c -12

anonymous · Answer

now on to degree 3
$$-2c^3+10c^3=8c^3$$

anonymous · Answer

and so on.  do it one degree at a time and you can do it in your head

anonymous · Answer

$$c ^{5}-3c ^{4}+8c ^{3}+10c ^{2}+3c-12$$

amistre64 · Answer

$ 2c^4-2c^3 +3c^2+13c -5$ 
$c^5$         $ +10c^3+6c^2 -3c +2$
     $ -5c^4$            $ +c^2 -7c -9$ 
------------------------------- 
$c^5 -3c^4 +8c^3 +10c^2 +3c -12$

anonymous · Answer

there you go!

anonymous · Answer

took a while didn't it!

amistre64 · Answer

:)

anonymous · Answer

You guys are very helpful, especially for someone like me they doesnt do well in math

anonymous · Answer

Do I have to put parenthesis around it? or is it entered the way you guys showed me without anything

amistre64 · Answer

paranthesis are just to seperate the 'stuff added'; so nekkid is good

anonymous · Answer

ok thanks

anonymous · Answer

Sry, but it says to simplify, Is that as low as it will go????????????????

amistre64 · Answer

unless you typed in the wrong problem, this is as simplified as it gets...