さえすれば

expression

as long as one does; if only one does; all one has to do is

Attaches to the 連用形 (masu-stem) of a verb or to a noun + を/が to express that doing or having that thing is sufficient for a desired result. Often used in conditional or hypothetical contexts.

• 努ど力りょくさえすれば、夢ゆめは叶かなう。

  As long as you make an effort, your dreams will come true.

• このボタンを押おしさえすれば、機き械かいが動うごき出だす。

  All you have to do is press this button, and the machine will start.