昨日の易者の占いなんか気にすることないよ。

What that fortuneteller said yesterday is nothing to be concerned about.

結果は気にするな。

Don't worry about the results.

世間の思惑など気にするな。

Don't mind what others think.

１モルの氷を水にするときと、１モルの水を水蒸気にするとき、より多くのエネルギーが必要なのは？

When converting 1 mole of ice into water, and 1 mole of water into steam, which requires more energy?

「あっそ」と流すのもよし、本気にするのもよし。

You can let it slide with a "oh?" or you can take it seriously.

そんな失敗なんて気にするな。人の噂も七十五日。みんなすぐに忘れるさ。

I wouldn't let a goof-up like that get to you. People have short memories and the one good thing about gossip is that it's short-lived.