英文翻译快快,在线等我的竞选口号是相信自我,挑战自我.请同学们相信我,支持我,给我投上你们神圣的一票吧! 谢谢大家.

My campaign slogan is:be confident with myself,challenge myself.Please believe me,support me and vote for me!
以上是直译,我觉得可以考虑下：
my campaign slogan is:always looking for challenge with full confidence 或 always looking for challenge and always be confident.
I need your trust and support,my near friends.Please vote for me!Thank you!