$$tex$$f$x$ = 6x^{2} - 15x - 8, \quad f$-x$ = 6x^{2} + 15x - 8$$/tex$$$$tex$$f$x$ = \frac{3x+1}{x^{2}-8}, \quad f$-x$ = \frac{-3x+1}{x^{2}-8}$$/tex$$$$tex$$f$x$ = x-3+\frac{10}{x}, \quad f$-x$ = -x-3-\frac{10}{x}$$/tex$$$$tex$$f$x$ = 2x^{2} - 4x + 7, \quad f$-x$ = 2x^{2} + 4x + 7$$/tex$$$$tex$$f$x$ = \frac{5}{x} + x^{2}, \quad f$-x$ = -\frac{5}{x} + x^{2}$$/tex$$$$tex$$f$x$ = x^{4} - x, \quad f$-x$ = x^{4} + x$$/tex$$