# ( i  + i ) * i #
 < < >  < > > < >
# ( X1 + i ) * i #
 < <    < > > < >
# ( X1 + X2 ) * i #
 < <      >  > < >
# ( X3 ) * i #
 <   =  > < >
# X4 * i #
   <  < >
# X4 * X5 #
   <   >
# X6 #

#((i+i))*(i+i)#

 +*i()#
+><<<>>
*>><<>>
i>>  >>
(<<<<=>
)>>  >>
#<<<<<

E-> E + T | T
T-> T * F | F
F-> i     | ( E )

E => T => T * F


# ( i  + i ) * i #
 < < >  < > > < >
# ( X1 + i ) * i #
 < <    < > > < >
# ( X1 + X2 ) * i #
 < <      >  > < >
# ( E ) * i #
# F * i #
# T * i #
# T * F #
# T #
# E #

X4 = T
X5 = F
X6 = E