SetDirectory["C:\\drorbn\\AcademicPensieve\\Classes\\14-1100"]

Make::usage = "Make[targets, sources, action] makes a target, or a list of targets, given sources, or a list of sources, in the style of the unix 'make' command.";
Make[target_String, sources_, action_Hold] := Make[Evaluate@{target}, sources, action];
Make[targets_, source_String, action__Hold] := Make[targets, Evaluate@{source}, action];
Make[targets_List, sources_List, action_Hold] := Module[{},
If[
(And @@ ((FileType[#] =!= None)& /@ sources)) &&
Or[
Or @@ ((FileType[#]===None)& /@ targets),
Min[AbsoluteTime[FileDate[#]]& /@ targets] < Max[AbsoluteTime[FileDate[#]]& /@ sources]
],
Print["Making ",targets, " ..."];
ReleaseHold[action]
]
];

?Make

name= "The_Simplicity_of_the_Alternating_Groups";
target =name<>".png";
source = "one/"<>name<>".pdf";
Make[target, source, Hold[
Read["!convert -density 200 -background white -alpha remove "<>source<>" "<>target];
]]

name= "1t3c5w";
target =name<>".png";
source = name<>".pdf";
Make[target, source, Hold[
Read["!convert -density 300 -background white -alpha remove -trim "<>source<>" "<>target];
Read["!montage -tile 2x1 -geometry +100+0 1t3c5w.png 1t3c5w.png 1t3c5w.png"];
]]

{
"TitleNotes" -> "This is my personal notebook for my 2014 <a href=http://drorbn.net/?title=14-1100>MAT 1100 Core Algebra</a> class. <span style=\"color: red;\">Use at your own risk.</span><p>",
"CleanTeX" -> True
}