Start moving the variables
x 2 + 3 x − 4 + 2 x 3 − 2 x + 5
= x 2 + 3 x + − 4 + 2 x 3 + − 2 x + 5
Then combine like terms:
= x 2 + 3 x + − 4 + 2 x 3 + − 2 x + 5
= ( 2 x 3 ) + ( x 2 ) + ( 3 x + − 2 x ) + ( − 4 + 5 )
= 2 x 3 + x 2 + x + 1
Answer: = 2 x 3 + x 2 + x + 1
