Mathematics Aid

Basic Math Concepts:

https://en.wikipedia.org/wiki/System_of_linear_equations

http://www.mathportal.org/calculators/polynomials-solvers/polynomial-graphing-calculator.php : Online Math Help

http://www.rapidtables.com/electric/dBm.htm#dBm_to_Calculator : dBm to Watt

Applied Math and Other Data (Very good website for various disciplines) :

http://mathworld.wolfram.com/

https://www.wolframalpha.com/examples/?src=input :Any type of data.

https://www.wolframalpha.com/examples/Math.html : useful for math

http://ice.dlut.edu.cn/LiMing/resource.html (Very important resources)

For Polynomial Equation Drawing / Equation Graph / Plot:

https://www.desmos.com/calculator

https://www.mathsisfun.com/data/grapher-equation.html#functions

Closed Form Equation:

https://www.youtube.com/watch?v=JJZ-shHiayU

Mathematical Symbols:

http://www.rapidtables.com/math/symbols/Basic_Math_Symbols.htm

In LaTeX:

https://www.sharelatex.com/learn/Mathematical_fonts

http://mathworld.wolfram.com/

https://www.math.ucdavis.edu/~kouba/CalcOneDIRECTORY/maxmindirectory/MaxMin.html

https://www.math.ucdavis.edu/~kouba/ProblemsList.html

http://www.math.canterbury.ac.nz/php/resources/math100/differentiation-and-applications/

https://www.youtube.com/watch?v=aCW8wm6nrRw :> Statistics

http://gonitpathshala.org/