How to translate these inspirational phrases correctly? I'm trying to make a label for my workbook but I'm not very sure how to write this phrase:

If you can dream it you can do it!.


Using google translate (traditional chinese) renders me this result:

如果你能做到夢想就可以做到！


The other phrase I want to translate is: (Again accompanied by google translate results)

Best of luck in Mathematics and Science!

祝你好運數學和科學！


Note: The meaning of this second sentence is referring to those different courses or subjects. Hence assistance is needed.

You're the number one student!

你是頭號學生


I'm not sure if these results are gramatically correct or if they do really mean what it was intended to say in english. Can somebody help me with a proper check and review of these?. 

Edit:

I'd like to get some help with translating the second sentence as it was left unattended by one of the answers.

Thanks in advance.
If you can dream it you can do it!
  梦得到的都做得到！ (what can be dreamed of can be done!)


梦得到的 that which can be dreamed (the 的 changes 梦得到 "can be dreamed" to "that which can be dreamed")
都 all (adverb)
做得到 can be done

verb得到 means "able to successfully verb". The opposite is verb不到. This is called the "potential complement" and is a common grammar pattern.


  You're the number one student!
  你是最佳学生！


你
是 are
最佳学生 best student (最佳X is a commmon pattern meaning best X, often used for best player in a football team etc)


  Best of luck in Mathematics and Science!


This one's a bit trickier. Do you mean "best of luck in the Mathematics and Science exam"? (or are they two different courses?). Or do you mean good luck with the course in general, not specifically the exam?