Integration Using Arctan function

How do I solve this integral? (HINT: USE ARCTAN!)

逆正接（逆正接）となる積分

Integration of a Rational Function - It's ArcTangent | Integration | Calculus | Glass of Numbers

arctan x dxの積分

Integrating the reciprocal of a quadratic (arctan/inverse tan integrals) FP2 FP3

Integration into Inverse trigonometric functions using Substitution

Integral arctan(1/x). Integration by parts: integrate inverse tangent.

Inverse Tangent Integration Formula (Calculus 2)

integration arctan

Integral of Arctan x - Table of Integrals

Integral of tan^-1(x)

integral of arcsin(x)

部分積分入門 --- 例: ∫xsinxdx & ∫arctan(x)dx

Integral with *BAD MATH*

Indefinite Integral of Inverse Trig Functions - Calculus

Integral of arctan(x)/x^2- Integral example

Integral of arctan(sqrt(x)) - Integral example

A MONSTER INTEGRAL!!! int 0 to infty arctan(x)/(x(x+1)(x^2+1))

Why int 1/(x^2 - a^2) = arctan USE TRIG SUB #calculus #mathematics