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a) 3x+2-6x+4
-3x+6
b)5x+x-3x+4
3x+4
c)6a+2a-6-3a+8
5a+2
d)(3a)(4a)-4-5a²+36
12a²-4-5a²+36
7a²+32
2
a)
4a² (3a²-2a)
12a⁴-8a³
b)
36(2b³+6b²)
72b³+216b²
c)
10x (-2x³+6x²-7)
-20x⁴+60x³-70x
d)
2ab(3a²+4b³+7a)
6a³b+8ab⁴+14a²b