Found the following HTML validation problems:
ASTBranch.html:84:6: Warning: missing </span> before <p>


ASTBranch.html:84:93: Warning: inserting implicit <span>


ASTBranch.html:87:6: Warning: missing </span> before <p>


ASTBranch.html:87:89: Warning: inserting implicit <span>


ASTBranch.html:90:6: Warning: missing </span> before <p>


ASTBranch.html:90:88: Warning: inserting implicit <span>


ASTFunction.html:87:6: Warning: missing </span> before <p>


ASTFunction.html:87:93: Warning: inserting implicit <span>


ASTFunction.html:90:6: Warning: missing </span> before <p>


ASTFunction.html:90:93: Warning: inserting implicit <span>


ASTFunction.html:93:6: Warning: missing </span> before <p>


ASTFunction.html:93:88: Warning: inserting implicit <span>


ASTMultiply.html:86:6: Warning: missing </span> before <p>


ASTMultiply.html:86:93: Warning: inserting implicit <span>


ASTMultiply.html:89:6: Warning: missing </span> before <p>


ASTMultiply.html:89:88: Warning: inserting implicit <span>


ASTMultiply.html:92:6: Warning: missing </span> before <p>


ASTMultiply.html:92:91: Warning: inserting implicit <span>


ASTPlus.html:83:6: Warning: missing </span> before <p>


ASTPlus.html:83:93: Warning: inserting implicit <span>


ASTPlus.html:86:6: Warning: missing </span> before <p>


ASTPlus.html:86:95: Warning: inserting implicit <span>


ASTPlus.html:89:6: Warning: missing </span> before <p>


ASTPlus.html:89:91: Warning: inserting implicit <span>


ASTTableFormula.html:81:6: Warning: missing </span> before <p>


ASTTableFormula.html:81:93: Warning: inserting implicit <span>


ASTTableFormula.html:84:6: Warning: missing </span> before <p>


ASTTableFormula.html:84:95: Warning: inserting implicit <span>


ASTTableFormula.html:87:6: Warning: missing </span> before <p>


ASTTableFormula.html:87:91: Warning: inserting implicit <span>


ASTVariable.html:114:6: Warning: missing </span> before <p>


ASTVariable.html:114:93: Warning: inserting implicit <span>


ASTVariable.html:117:6: Warning: missing </span> before <p>


ASTVariable.html:117:93: Warning: inserting implicit <span>


ASTVariable.html:120:6: Warning: missing </span> before <p>


ASTVariable.html:120:88: Warning: inserting implicit <span>