English: Now for time t greater than two this will anyway remain there so when you separate these two terms you can simply say that integral of u(λ)e^(−(t−λ))dλ is nothing but what we calculated in the previous step, so you can simply put the value as 1 − e^(−t) and then next is u(λ−2) function now we know that this will this will have value as one when the time t is ranging between two to t so we will change the integral value from two to t this value will become one and then e^(−(t−λ))dλ.
Telugu: కాబట్టి మీరు ఈ రెండు పదాలను వేరుచేసినప్పుడు u(λ)e^(−(t−λ))dλ యొక్క ఇంటెగ్రల్ మునుపటి దశలో మనం లెక్కించినది తప్ప మరొకటి కాదని మీరు చెప్పగలరు.