Zindagi mein chahe kuch mat karna...lekin yeh kaam zaroor karna.     ...... (1)

Yeh kaam= iss book pe vote,comment aur isko share.  .....(2)

Putting value of (2) in (1)

Zindagi mein chahe kuch mat karna...lekin iss book pe vote,comment aur isko share zaroor karna.

Hence proved!