Expert Mode using one command block

summon MinecartCommandBlock ~ ~.6 ~ {
	Command:setblock ~ ~ ~ air,Riding:{
	Command:setblock ~ ~-1 ~ air,id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~ ~-1 command_block 0 keep {Command:"/replaceitem entity @e[type=Zombie] slot.armor.legs minecraft:iron_leggings"},id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~ ~1 command_block 0 keep {Command:"/replaceitem entity @e[type=Zombie] slot.armor.head minecraft:diamond_helmet"},id:MinecartCommandBlock,Riding:{
	Command:setblock ~4 ~ ~ command_block 0 keep {Command:"/replaceitem entity @e[type=Zombie] slot.weapon iron_sword"},id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~ ~ command_block 0 keep {Command:"entitydata @e[type=Creeper] {Fuse:10,ExplosionRadius:25}"},id:MinecartCommandBlock,Riding:{
	Command:tellraw @a {"text":"Set game difficulty to Expert"},id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~ ~ redstone_block,id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~1 ~ command_block 0 keep {Command:"setblock ~ ~-1 ~ redstone_block"},id:MinecartCommandBlock,Riding:{
	Command:setblock ~3 ~-1 ~ command_block 0 keep {Command:"setblock ~ ~1 ~ air"},id:MinecartCommandBlock,Riding:{
	Command:tellraw @a {"text":"\u00A7e\u00A7lExpert Difficulty by FinalfanX"},id:MinecartCommandBlock,Riding:{
	Command:gamerule commandBlockOutput false,id:MinecartCommandBlock,Riding:{
	Block:activator_rail,Time:1,DropItem:0,id:FallingSand
}}}}}}}}}}}}}