For the first one (Double factorial used)

(4! + 4 + 4!!/4) = 30

For the second one (Double factorial again):

(4! + 4!! - 4 / 4) = 31

For the first one (Double factorial used)

$(4! + 4 + \frac{4!!}{4}) = 30$

For the second one (Double factorial again):

$(4! + 4!! - \frac{4 }{ 4}) = 31$