9. 已知函数f(x)=ax5+bx3+3f(x)=ax^{5}+bx^{3}+3f(x)=ax5+bx3+3且f(2023)=16f(2023)=16f(2023)=16,则f(−2023)f(-2023)f(−2023)的值为 ___−10-10−10___.