# Elementary function

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 $f(x)=2$ a constant function $f(x)=x^3$ a power function $f(x)=\sqrt{x}$ a root function $f(x)=x^2-9x+3$ a polynomial function $f(x)=\frac{x^2+2x+3}{x^2+1}$ a rational function $y=\sin(x)$ a trigonometric function $y=\arcsin(x)$ an inverse trigonometric function $y=\ln(x)$ a logarithmic function (specifically, the natural logarithm) $y=e^x$ an exponential function $y=\frac{xe^x-\log_2(1+x^2)}{\sqrt{\arctan(3x)}}$ an elementary function combining several of the above types of functions