Mark and calculate expressions [[$ P(x) = -3x^2 $]] and [[$Q(x) = 2x^4 -4x $]] , when

a) [[$2 \cdot Q$]]


b) [[$ -P \cdot P$]]


c) [[$P \cdot (-Q)$]]


d) [[$P + P \cdot Q$]]


e) [[$P \cdot P - Q$]]


f) [[$ -P \cdot Q + P$]]