4.1 on maple data types
4.2 how to extract elements from a list based on some selection?
4.3 how to test if all elements of a matrix are integers?
4.4 How to select terms with sqrt or radical
4.5 How to find all csgn() and replace them by 1
4.6 How to find symbols inside csgn() in an expression?
4.7 How to replace all abs(expr) by expr
4.8 How to obtain list of all occurrences of some function in an expression?
4.9 How to replace \(\ln (|x|)\) with \(\ln (x)\) in an expression?
4.10 How to find all signum functions in expression and simplify it?
4.11 How to replace all signum functions in expression by 1?
4.12 How to find if some function is present in an expression
4.13 How to find all functions in an expression?
4.14 find all functions except builtin math functions
4.15 How to obtain a list of all arguments of a single function?
4.16 How to obtain a list of all arguments of a single function in an expressions?
4.17 How to obtain a list of all arguments of the D function in an expressions?
4.18 Find functions whose first argument is \(z\)
4.19 Find functions whose second argument is \(t\)?
4.20 How to use select with own type to find sub expressions?
4.21 How to write structured types to match some expressions?
4.22 select only indexed variables from an expression
4.23 Given an expression, how to find all variables and functions in it?
4.24 How to check if an expression is integer, when it has symbols in it?
4.25 How to find parameters such as \(\pi \) in an expression?
4.26 How to find all derivatives \(y'(x)\) in an expression?
4.27 How combine log terms?
4.28 Find position in a list of items that are not numeric
4.29 How to change \(\arctan (y,x)\) to \(\arctan \left (\genfrac {}{}{}{}{y}{x}\right )\) in an expression
4.30 How to find all symbols that represent variables in an expression?
4.31 How to change first argument of function?
4.32 How to change last argument of function?
4.33 How to remove last argument of function?
4.34 How to find a pattern inside an expression
4.35 How to find parts of a Sum?
4.36 find if sequence or list is inside another and the indices
4.37 find if some type inside some expression and its location
4.38 How to check that all entries in a list have the same type?
4.39 How to replace generic function inside derivative?
4.40 Examples how to match types
4.41 On the order of terms when using indents