$\int \sec ^{2} \operatorname{ascc}^{2} x d x=?$

$\tan \tan x+c$

$\left(\sec ^{2} a\right) \tan x+c$

$\tan a+\tan x$

$\cot a \cot x+c$

$\operatorname{cosec}^{2} a \operatorname{cosec} x+c$