i'm having some problem trying to figure this intergration out

i think this is intergration by parts

well there are no intergratuon signs on the keys so i'm gonna try my

best to type this

g(t) = intergrate sign fsub x(u) * fsubx(t-u)du

upper limit is infinty

lower limit is neg infinty

fsubx(t) = { 0 (t<0)

{ (lambda)(e) ^ -(lambda)(t)

take a =.30 and b =1.45

lambda=2 when graphs and evaluation.