Problems from Adding and subtracting polynomials

Development:

	p(x)	q(x)	p(x)+q(x)
degree 0	$0$	$-3$	$-3$
degree 1	$x$	$-x$	$0$
degree 2	$0$	$0$	$0$
degree 3	$-x^3$	$2x^3$	$x^3$

Solution:

$p(x)+q(x)=x^3-3$

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