_________ \/ atan(t)
1 ---------------------- / 2\ _________ 2*\1 + t /*\/ atan(t)
/ 1 \ -|t + ---------| \ 4*atan(t)/ --------------------- 2 / 2\ _________ \1 + t / *\/ atan(t)
2 4*t 3 3*t -1 + ------ + ------------------- + ------------------ 2 / 2\ 2 / 2\ 1 + t 8*\1 + t /*atan (t) 2*\1 + t /*atan(t) ------------------------------------------------------ 2 / 2\ _________ \1 + t / *\/ atan(t)