Consider the function f(t)=7sec2(t)9t2\displaystyle {f{{\left({t}\right)}}}={7}{{\sec}^{{2}}{\left({t}\right)}}-{9}{t}^{{{2}}}.

Let F(t)\displaystyle {F}{\left({t}\right)} be the antiderivative of f(t)\displaystyle {f{{\left({t}\right)}}} with F(0)=0\displaystyle {F}{\left({0}\right)}={0}. Then
F(t)\displaystyle {F}{\left({t}\right)} =