Simplify: 2[a−(b−c)]+2b2[a - (b - c)] + 2b2[a−(b−c)]+2b.
2a+2c2a + 2c2a+2c
2a−4b+2c2a - 4b + 2c2a−4b+2c
2a+2b+2c2a + 2b + 2c2a+2b+2c
2a2a2a