1. \(a^2 a^3 = a^{2+3} = a^5\)
2. \(a^2 a^4 a^3 = a^{2+4+3} = a^9\)
3. \(b^7 b^5 b^2 b = b^{7+5+2+1} = b^{15}\)
4. \(x^3 x^6 x^7 x^4 = x^{3+6+7+4} = x^{20}\)
5. \(y^2 y y^3 y^8 = y^{2+1+3+8} = y^{14}\)
6. \(a^2 a^4 a^2 a^7 = a^{2+4+2+7} = a^{15}\)
7. \(3^5 3^3 3^2 = 3^{5+3+2} = 3^{10}\)
8. \(2^2 2^2 2^6 2 = 2^{2+2+6+1} = 2^{11}\)