#!/usr/bin/env python
# coding: utf-8

# ```python
# 
# display
# 
# symbols
# Function
# 
# subs
# 
# evalf
# 
# simplify
# 
# expand
# factor
# 
# diff
# integrate
# limit
# Derivative
# Integral
# Limit
# doit
# 
# solve
# dsolve
# 
# Matrix
# row
# row_del
# inv
# ```

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