$(3$x$3$tanx$)($tanx$3$x$3)=$

A$\mathrm{.}9$x$2$tanx$3$x$3$sec$2$xsec$2$xsec$2$x$9$x$2$tanx$3$x$3$sec$2$x$$

B$\mathrm{.}9$x$2$tanx$+3$x$3$sec$2$xsec$2$xsec$2$x$9$x$2$tanx$+3$x$3$sec$2$x$$

C$\mathrm{.}9$x$2$tanx$3$x$3$sec$2$xtan$2$xtan$2$x$9$x$2$tanx$3$x$3$sec$2$x$$

D$\mathrm{.}9$x$2$sec$2$xsec$2$x$9$x$2$

E$\mathrm{.}9$x$2$tanx$+3$x$3$sec$2$xtan$2$xtan$2$x$9$x$2$tanx$+3$x$3$sec$2$x$$