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-
-
-# math-expression-evaluator
-An extremely efficient, flexible and amazing evaluator for Math expression in Javascript.([Documentation](http://redhivesoftware.github.io/math-expression-evaluator/))
-
-## Use cases
-|Input|Result|Explanation|
-|:---:|:---:| --- |
-|**2+3-1**|4| Addition and Subtraction operator |
-|**2\*5/10**|1| Multiplication and Division operator |
-|**tan45** *or* **tan(45)**|1| Trigonometric Function ( tan in Degree mode) |
-|**tan45** *or* **tan(45)**|1.619775190543862| Trigonometric Function ( tan in Radian mode) |
-|**Pi1,15,n** *or* **Pi(1,15,n)**|1307674368000| Product of Sequence |
-|**Sigma1,15,n** *or* **Sigma(1,15,n)**|120| Sum of Sequence( also called summation)  |
-|**2^3**|8| Exponent( note this operator is left associative like MS Office) |
-|**5P3**|60| Permutaion Method to calculate all the permutaions |
-|**sincostan90** *or* **sin(cos(tan(90)))**|0.017261434031253| Multiple functions with or without parenthesis (both works) |
-
-### [Fiddle Yourself](http://jsbin.com/fuyowu/1/edit?html,output)
-
-## Installation
-### Node JS
- **Using npm** 
-
-    npm install math-expression-evaluator
-
-### Browser
- **Using bower**
-
-    bower install math-expression-evaluator
-
-### How to run test
-
-    npm test
-
-## Supported symbols
-
-|Symbol|Explanation|
-|:---:|:---:|
-|**+**| Addition Operator eg. 2+3 results 5 |
-|**-**| Subtraction Operator eg. 2-3 results -1 |
-|**/**| Division operator eg 3/2 results 1.5 |
-|**\***| Multiplication Operator eg. 2\*3 results 6 |
-|**Mod**| Modulus Operator eg. 3 Mod 2 results 1 |
-|**(**| Opening Parenthesis |
-|**)**| Closing Parenthesis |
-|**Sigma**| Summation eg. Sigma(1,100,n) results 5050 |
-|**Pi**| Product eg. Pi(1,10,n) results 3628800 |
-|**n**| Variable for Summation or Product |
-|**pi**| Math constant pi returns 3.14 |
-|**e**| Math constant e returns 2.71 |
-|**C**| Combination operator eg. 4C2 returns 6 |
-|**P**| Permutation operator eg. 4P2 returns 12 |
-|**!**| factorial operator eg. 4! returns 24 |
-|**log**| logarithmic function with base 10 eg. log 1000 returns 3 |
-|**ln**| natural log function with base e eg. ln 2 returns .3010 |
-|**pow**| power function with two operator pow(2,3) returns 8 |
-|**^**| power operator eg. 2^3 returns 8 |
-|**root**| underroot function root 4 returns 2 | 
-|**sin**| Sine function |
-|**cos**| Cosine function |
-|**tan**| Tangent function |
-|**asin**| Inverse Sine funtion |
-|**acos**| Inverse Cosine funtion |
-|**atan**| Inverse Tangent funtion |
-|**sinh**| Hyperbolic Sine funtion |
-|**cosh**| Hyperbolic Cosine funtion |
-|**tanh**| Hyperbolic Tangent funtion |
-|**asinh**| Inverse Hyperbolic Sine funtion |
-|**acosh**| Inverse Hyperbolic Cosine funtion |
-|**atanh**| Inverse Hyperbolic Tangent funtion |
-
-## Features  
-
-### Amazing support for Sigma and Pi  
-This is a fantastic feature of this calculator that it is capable of evaluating expressions containing **Sigma and Pi**.  
-Passing `Sigma(1,100,n)` will evaluate to 5050 as n is summationed from 1 to 100.
-and Pi(1,15,n) will evaluate to 1307674368000 as n is multiplied from 1 to 15 which is equal to 15!
-
-### Parenthesis less expression
-If a expression is readable by human then it is readable by this evaluator. There is no need to wrap every function inside parenthesis.
-For eg. sin90 will work totally fine instead of sin(90)
-
-
-##Changelog
-
-### Removed lodash.indexof and used native Array.prototype.indexOf hence dropping suppports for IE8 and below. 
-This will reflect in next release named v1.2.16