Seems to be answered well.
Helpful websites that can do mathematics at pretty much any level, it helped me with my degree econometrics.
Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
www.wolframalpha.com
Symbolab: equation search and math solver - solves algebra, trigonometry and calculus problems step by step
www.symbolab.com
If u want help with maths those things can do anything from advanced integration using trigonometric functions to simple equations. I prefer symolab but wolframalpha is better with explainations.
Since I am also a lazy mathematician this should help you.