can someone break down how to take the integral of this problem?

20te^-10t dt

e^-10t dt -10te^-10t dt= te^-10t

e^-10tdt=(e^-10t)/-10
10te^-10tdt=(e^-10t)/(-10)-te^-10t
20te^-10t dt =(e^-10t)/(-5)-2te^-10t