Efetue as operações algébricas, simplificando os termos semelhantes:
a)
2 − 5 + 7
2 − 9
2 + 4 −
2 + 2
2 − 8
2 + 7
2 =
b)
2
4
3
5
22
.
15
3
4
433
=
c) 5(3x
4
– 4x
3 + 7x
2
–11x + 9) + 2(3x
4
– 4x
3 + 7x
2
– 11x + 9) =
d) a
3
.(a
2
– 5a + 7) – 6a
2
.(a
2
– 5a + 7) + 8a.(a
2
– 5a + 7) – 13(a
2
– 5a + 7) =
e) 3b
4
– 5c
3 + 7b
3 + 4b – 10 + 5b
4
– (2b
3
– 6c
2
).(4c + 16) =