### search-provider: stop normalizing the equation twice

When an equation is given by the g-s overview, g-c will solve this equation, where it will be first normalized and then solved. This is done by running a subprocess, where g-c will call g-c in this subprocess with the "--solve" argument. With this "--solve" argument, the equation will also be normalized. However, when an equation is given by the g-s overview, it will also be normalized in a check, that happens before the solve process, to not to process single numbers given by the g-s overview. This normalized equation will then be used to invoke the subprocess to solve the equation, leading into normalizing the already normalized equation and therefore resulting into wrong results when the equation itself contains decimal numbers. Solve this issue, by invoking the subprocess with the unnormalized equation, instead of the normalized one, to not to normalize the equation twice. Closes: #104