ya,, but i don't understand how multi bit and multi way gates works please.. help me in this case..
The multi-bit gates are like 16 of the single bit gates in a chip. Read appendix A.5.3 to learn how to connect to the individual bits of the multi-bit input and output pins.
Not16, for instance, will consist of 16 Not parts.
Your And2 shows that you have the right idea about the multi-way chips. For Or8Way you'll need 7 Ors. Use the bus syntax from A.5.3 to Or the individual bus wires together.
Read The Hardware Construction Survival Kit
Search the forum for Mux4Way16 and DMux4Way for ideas for those parts.