Mathematics, 07.06.2021 14:00 pastormac2011

I will mark you brainliest if you solve this show your working as well
4) (4x2– x – 7) + (2x3+ 6x2– 11)
5)(2x3– x + 4) + (5x2– 6x – 5)
6)(3x2+ 2x + 1) – (x2– 3x + 4)
7)(2x2– 3x + 7) – (5x2+ 3x + 6)

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I will mark you brainliest if you solve this show your working as well
4) (4x2– x – 7) + (2x3...