In the derivation process of [∫ (0, x) TF (T) DT] 'explained by experts, the result should be XF (x), or XF (x) -∫ (0, x) f (T) DT

In the derivation process of [∫ (0, x) TF (T) DT] 'explained by experts, the result should be XF (x), or XF (x) -∫ (0, x) f (T) DT