(x + 1)(2x^2 + 3x - 1) : Can be solved in multiple ways but easiest for me :P
x (2x^2 + 3x - 1) + 1(2x^2 + 3x - 1)
(2x^3 + 3x^2 - x) + (2x^2 + 3x - 1)
2x^3 + 5x^2 + 2x - 1
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