I see your BIDMAS and raise you a BADMIS
JavaScript (V8), &nbsp;118&nbsp; 112 bytes

Prints the results.



f=(s,x='',y=x,o='+-*/')=&gt;[...o].map(v=&gt;f(s.split(v).join(x+v+y),x+')',y+'(',o.replace(v,'')))|print(eval(y+s+x))


Try it online!

Or see the deduplicated results.