Ex.1:

W)

$w(t)=10\cos(5t)u(t)$

X)

$x(t)=2\sqrt{2}\cos(5t+\pi/4)u(t)$

Y)

$y(t)=\delta(t)+2u(t)+2tu(t)+3t^2u(t)$

Z)

$z(t)=\delta(t)+2\exp(-t)\cos(t)u(t)$

E)

$e(t)=\delta'(t)-2\delta(t)+9\exp(-3jt)u(t)$

F)

$f(t)=[25+10(t-5)+(t-5)^2]u(t-5)$

G)

$g(t)=[T\exp[-\alpha(t+T)+(t-T)\exp(-\alpha t)]u(t-T)$

H)

$h(t)=10t^2\exp(-\alpha t)u(t)$

I)

$i(t)=[t\exp(-t)+2\exp(-7t)]u(t)$

M)

$m(t)=(1-t)u(t)+(t-1)u(t-1)$