def __str__(self):
wrt = self.wrt
if not isinstance(wrt, Symbol):
wrt = delim(wrt)
if isinstance(self.arg, Expr):
return fr'\frac{{ {{\rm d}} }}{{ {{\rm d}}{self.wrt} }}{delim(self.arg)}'
return fr'\frac{{ {{\rm d}}{self.arg} }}{{ {{\rm d}}{self.wrt} }}'
def __str__(self):
arg = self.arg
s = str(arg)
if not isinstance(arg, Symbol):
if not hasattr(arg, 'base'):
s = delim(s)
return fr'-{s}'
def __str__(self):
s = ''
for arg in self.args:
if isinstance(arg, (Add, Neg, Mul)):
s += delim(str(arg))
else:
s += str(arg)
return s
def __str__(self):
base = self.base
if not isinstance(base, (Symbol, Indexed)):
base = delim(base)
power = self.power
if isinstance(power, Neg):
if power == -Number(1):
return fr'\frac{{1}}{{{base}}}'
return fr'\frac{{1}}{{{base}^{{{power.arg}}} }}'
return fr'{base}^{{ {power} }}'
def __str__(self):
lims = self.lims
arg = self.arg
if isinstance(arg, Add):
arg = delim(arg)
return fr'\sum_{{{lims[0]}={lims[1]}}}^{{{lims[2]}}}{arg}'
def __str__(self):
return delim(self.name)
def __str__(self):
s = '+'.join([
str(arg) if not isinstance(arg, Add) else delim(str(arg))
for arg in self.args
])
return s.replace('+-', '-')