I am getting
C:\Users\Daniel\Documents\Universidad\ProyectosCpp\derivadas\main.cpp|60|error: no match for 'operator==' in 'subexpresionesparentesis[2] == '*''|
String literals are in double-primes (" "), char literals in single-primes (' '). subexpresionesparantesis[2] is a string. subexpresionesparantesis[2][i] would be a char.
On line 60 (or what I believe to be line 60 anyway; if you don't use code tags, we can't see line numbers...) you're comparing a string to a char. Replace '*' with "*" and it should work.