commands to go with visual mode within the formula

[OliverHeffernan]

• - d{motion}
• - c{motion}
• - y{motion}
• - diw
• - ciw
• - diW
• - ciW
• - yiw
• - yiW

the motion ones is just detecting if it is a valid motion, then changing the command essentially to v{motion}{command}

for example, if I did dtf, the parsed command would be vtfd. Select to the f, then delete.