go through the motions

[go through the motions] {v. phr.} To pretend to do something bymoving or acting as if you were really doing it; do something withoutreally trying hard or caring.

Jane was angry because she couldn'tgo out, and when her mother said to dust her room she just wentthrough the motions.

The team was so far behind in the game thatthey just went through the motions of playing at the end.