Math.
Just saying the word makes some students shudder.
But, you have to take it to graduate. And, yes, believe it or not, you might just use those equations, or at least the math processes, in real life.
So, if you are sitting at your kitchen table until the wee hours of the morning scratching out problems over and over again, and find you just can’t figure it out, you may want to check out some of these free math help sites online. Each is designed for advanced high school math courses and beyond, so don’t worry about tripping over the little kid stuff.