[tex](a - 2a + 3)(a + 2)[/tex]
[tex]a \times (a + 2) - 2a \times (a + 2) + 3(a + 2)[/tex]
[tex] {a}^{2} + 2a - 2a \times (a + 2) + 3(a + 2)[/tex]
[tex] {a}^{2} + 2a - {2a}^{2} - 4a + 3(a + 2)[/tex]
[tex] {a}^{2} + 2a - {2a}^{2} - 4a + 3a + 6[/tex]
[tex] - {a}^{2} + 2a - 4a + 3a + 6[/tex]
[tex] - {a}^{2} + a + 6[/tex]
