tan−1x\tan ^{-1} xtan−1x
11+x2\frac{1}{1+x^{2}}1+x21
etan−1xe^{\tan ^{-1} x}etan−1x
etan−1x11+x2e^{\tan ^{-1} x} \frac{1}{1+x^{2}}etan−1x1+x21