AND — TO — AND WHICH
AND—Not to be used instead of to after such words as come and try. Also do not insert and immediately before etc.
1) Come to (not come and) visit me.
2) Try to (not try and) make amends.
3) Pens, ink, paper, etc.
AND WHICH—Do not use and before which unless another which has preceded it. A reader may not notice this redundance in a long sentence.
1) We live in a more or less faithless age, in which (not and
in which) materialism is more popular than spirituality.