Question

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2 + x − x² + 6x³, −6 −2x + 4x² −3x³, 2 + x², 3 − x³ + 4x − 2x²

Answer 1

Sum of the given expressions
= (2 + x − x² + 6x³)+(−6 −2x + 4x² −3x³)+( 2 + x²)+( 3 − x³ + 4x − 2x² )
Rearranging and collecting the like terms
= 6x³ −3x³− x³− x² +4x²+ x²− 2x²+ x −2x+ 4x+2-6+2+3
= (6-3-1)x³+(-1+4+1-2)x²+(1-2+4)x+1
= 2x³+2x²+3x+1