Question

$(4x^{3}+7x)-(3x^{3}+2x)$

Explanation:

Step1: Distribute the negative sign

$4x^3 + 7x - 3x^3 - 2x$

Step2: Combine like $x^3$ terms

$(4x^3 - 3x^3) + 7x - 2x = x^3 + 7x - 2x$

Step3: Combine like $x$ terms

$x^3 + (7x - 2x) = x^3 + 5x$

Answer:

$x^3 + 5x$