基于方程的科学计算器

这是一个基于方程的计算器。它能让你自定义并且编辑不限量的方程，并且用它们来简化计算。就像在电脑上编程一样，你可以创建一个多参数的方程。你还可以在一个方程中调用另一个方程。

这是一些特性：
-- 内置三角函数，对数函数
-- 内置随机数发生器
-- 你可以为你添加的函数写注释。
-- 当主按键被按下时会有振动。当然你也可以将这个功能关闭
-- 当然，还有基本计算功能（+ - ×÷）

最后，感谢你选用这款可编程计算器，并且希望你能体会到它所带来的便捷。 This is a calculator equation. It allows you to customize and edit an unlimited number of equations and use them to simplify calculations. Just as in a computer programming, you can create a multi-parameter equation. You can also call another equation in an equation.

Here are some features:
- Built-in trigonometric, logarithmic functions
- Built-in random number generator
- You can write a comment to the function you add.
- When the main key is pressed there will be vibration. Of course you can turn off this feature
- Of course, there are basic computing functions (+ - × ÷)

Finally, thank you choose this programmable calculator, and I hope you can appreciate the convenience it brings.