Let F$($x$,$y$,$z$)=(4$xz$2,4$xyz$,5$xy$3$z$)$

be a vector field and f$($x$,$y$,$z$)=$x$3$y$2$z

$.$

$$f$=($

$3$x$^2$y$^2$z

$,$

$2$x$^3$yz

$,$

x$^3$y$^2$

$)$

$.$

$\backslash$times F$=($

$15$xy$^2$z$-4$xy

$,$

$,$

$)$

$.$

F$\backslash$times $$f$=($

$,$

$,$

$)$

$.$

F$$f$=$