2. Упростить: a, b, c

2. a. \( x^{2y^3} (3x^5 y^{12})^2 \): \( x^{2y^3} \cdot 9x^{10} y^{24} = 9x^{2 + 10} y^{3 + 24} = 9x^{12} y^{27} \). b. \( (4b^2 c^3)^3 (2abc)^2 \): \( 64b^6 c^9 \cdot 4a^2 b^2 c^2 = 256a^2 b^{6+2} c^{9+2} = 256a^2 b^8 c^{11} \). c. \( \frac{x^{12}}{x^8} \cdot (x^2y^3)^3 \): \( x^{12-8} \cdot x^6 y^9 = x^{4+6} y^9 = x^{10} y^9 \).