Evaluate the following: (a)
(sint)/(t+2)\delta (t)
(b)
(1)/(jt+t^(2))\delta (t+3)
(c)
e^(-x)[\delta (x-2)+\delta (x-6)]
(d)
\int_(-\infty )^(4.5) (w^(3)-w^(2)+2)[\sum_(k=0)^(\infty ) \delta (w-k)]dw