/
a
b
c
d
a+b
ab
a*
/*
/*
/*
/*
/*
/
/
/
/
/
/
/
/
(abcd)*(cdab)*
(aa)*+aa*
abc+a*b*c*
a+b+c*+d
(a+b+/*)(c+/*+d)(/*+e+f)
a+a
aa*+b*b
a+b+c+d
/*+a
a+bc+abc+d
/*
c+d
a+ab+abc+abcd+/*
(a+b)(c+d)eeeee
abc+bcd+(abcde)*
ab*c
a*b+c
(a+b)c+d(a+(bc)*)
abcd
aaaa
ab*
a*b
(ab)*
a+b*
a*+b
(a+b)*
a+b+c+d+/*
ab+bc+cd
(a+b+c)(b+c+d)
(a+b)c+a(b+c)
(cd)*+((a+/*)bc(/*+d))*
(a+/*)(b+/*)(cd)*e
a(a+b+c+d)*
(dc)*+((d+/*)cb(/*+a))*
e(dc)*(b+/*)(a+/*)
(a+b+c+d)*a
/
abc
/
abc
(abc)*
bc(abc)*
(abc)*ab
a+ab+bc+baca+(abcd)*
(caaaa+ab)*a+bb
(a+b)(b+c)(c+d)(d+a)
(ab(c+/*))*
(ab+bc(a+d)*)*
/*
a*
a*
a*
a*
/
/
/
cd
a
a
a
b
a*
a*
/*
/*+ab
c*
/*
/*
/*
abac
a*b*a*c*
(a+d)(b+c)(d+a)(c+e)
(ab)*c
(a+b)*c
(aa+b)*c
abac
0
(1+2)*
(34+567a)*
