Well, if you don't find me expert enough (I'm peer-reviewed published in higher math for signal processing, nuclear reactor stuff, hydrodynamics, and radar among other things, and have lectured on and taught related stuff at the post-grad level), or DaS, another cool guy in the science biz
- then just use the wiki info that novox 77 kindly copied:
Similarly, care must be exercised when using the slash ('/') symbol. The string of characters "1/2x" is interpreted by the above conventions as (1/2)x. The contrary interpretation should be written explicitly as 1/(2x).
Substitute (1+2) for x and it's case closed.