pke cara nya yaya....bsk dikumpulkan

[tex]a. \\ 3(a - 3b) + 2(a + 5b) \\ 3a - 9b + 2a + 10b \\ 5a + b \\ \\ b. \\ - 4(5x - 2y) + 6(2x - 2y) \\ - 20x + 8y + 12x - 12y \\ - 8x - 4y \\ - 4(2x + y) \\ \\ a. \\ 3 {a}^{2} b \times ( - 2 {a}^{3} {b}^{2} ) \\ - 6 {a}^{5} {b}^{3} \\ \\ b. \\ \frac{ {a}^{4} {b}^{3} }{ {a}^{2} } \\ {a}^{2} {b}^{3} [/tex]