Formit, mathValidator and Spam

<div class="fastq">
  <div class="fastqtop"></div>
  <div class="fastqtitle">
    <div class="fastq-title">[[*introtext]]</div>
  </div>
  <div class="fastqform">
    <form action="[[~[[*id]]]]" method="post" class="fast-question" name="fast-question">
      <input type="hidden" name="workemail:blank" value="" />
      <input type="hidden" name="pagetitle" value="[[*pagetitle]]" />
      <input type="hidden" name="sample" value="[[date]]" />
      <input type="hidden" name="subdate" id subdate" value="[[date]]" >
      <ul class="fastqleft">
        <li class="fastq-sal">
          <select name="fastq_sal" value="[[!+fi.fastq_sal]]" id="fastq_sal">
            <option value="">Title</option>
            <option value="Mr" [[!+fi.fastq_sal:FormItIsSelected=`Mr`]]>Mr</option>
            <option value="Miss" [[!+fi.fastq_sal:FormItIsSelected=`Miss`]]>Miss</option>
            <option value="Mrs" [[!+fi.fastq_sal:FormItIsSelected=`Mrs`]]>Mrs</option>
            <option value="Ms" [[!+fi.fastq_sal:FormItIsSelected=`Ms`]]>Ms</option>
            <option value="Dr" [[!+fi.fastq_sal:FormItIsSelected=`Dr`]]>Dr</option>
          </select>
          <span class="error"> [[!+fi.error.fastq_sal]]</span> </li>
        <li class="fastq-name">
          <input type="text" name="fastq_name" id="fastq_name"  onfocus="if(this.value == 'Forename: [[!fi.fastq_name]]') { this.value = ''; }" value="Forename: [[!fi.fastq_name]]" />
          <span class="error"> [[!+fi.error.fastq_name]]</span> </li>
        <li class="fastq-surname">
          <input type="text" name="fastq_surname" id="fastq_surname" onFocus="if(this.value == 'Surname: [[!fi.fastq_surname]]') { this.value = ''; }" value="Surname: [[!fi.fastq_surname]]" />
          <span class="error"> [[!+fi.error.fastq_surname]]</span> </li>
        <li class="fastq-email">
          <input type="text" name="fastq_email" id="fastq_email" onFocus="if(this.value == 'Email: [[!fi.fastq_email]]') { this.value = ''; }"  value="Email: [[!fi.fastq_email]]" />
          <span class="error" > [[!+fi.error.fastq_email]]</span> </li>
        <li class="fastq-email">
          <input type="text" name="fastq_contact" id="fastq_contact" onFocus="if(this.value == 'Preferred Contact Number:') { this.value = ''; }" value="Preferred Contact Number:" />
        </li>
      </ul>
      <ul class="fastqright">
        <li class="fastq-text">
          <textarea name="fastq_text" id="fastq_text">Tell us about your current situation; whether you have a claim already or are thinking of making a claim. [[!+fi.fastq_text]]</textarea>
          <span class="error">[[!+fi.error.fastq_text]]</span> </li>
        <li><span style="font-size:12px; padding-lefT:20px;">What is [[!+fi.op1]] [[!+fi.operator:is=`-`:then=`-`:else=`+`]] [[!+fi.op2]]?<span class="error">[[!+fi.error.math]]</span></span>
          <input type="hidden" name="op1" value="[[!+fi.op1]]" />
          <input type="hidden" name="op2" value="[[!+fi.op2]]" />
          <input type="hidden" name="operator" value="[[!+fi.operator]]" />
          <input type="text" name="math" value="[[!+fi.math]]" />
          <br/>
          <span style="font-size:10px;">This ensures that you are a person, not an automated program, submitting this form. This field is required. </span></li>
        <li class="fastq-submit">
          <input type="submit"  width="183" height="21" value="Submit" name="fastqsub"  id="fastqsub"  onClick="_gaq.push(['_trackEvent', 'Contact', 'Submit Contact Form', 'Page – [[*pagetitle]]']);"/>
        </li>
      </ul>
    </form>
    <div style="clear:both;"></div>
  </div>
</div>

[[!FormIt?
&hooks=`spam,email,math,formit2db,redirect`
&emailSubject=`Fast Question`
&preHooks=`db2formit`
&prefix=`cont_`
&packageName=`contact_fast`
&tablename=`fast_form`
&customValidators=`mathValidator`,
&emailTpl=`FastQuestionResult`
&emailTo=`[email protected]`
&emailCC=`[email protected]`	    	    
&redirectTo=`341`
&submitVar=`fastqsub`
&validate=`workemail:blank,math:required:mathValidator,fastq_name:required,fastq_surname:required,fastq_email:email:required,fastq_text:required`
 
]]

if (trim($value) == "") return true; // exit if blank text box
$value = $value; // the input value in the field math
 
$op1 = intval( $_POST['op1']) ; // intval() to be sure the value of op1 and op2 are treated as numbers
$op2 = intval($_POST['op2']) ;
$operator = $_POST['operator'] ; // value of field operator (should be + or - )
 
switch($operator){
    case '+':
        $goodresult = $op1 + $op2; // result  if operator is 'plus' ...
        if($value!=$goodresult){ // if answer not equal expected result
            //$validator->addError('math', 'The answer is false.');
   $validator->addError('math', 'the value should be '.$value);
            return false;
        }
        break;
     case '-':
        $goodresult = $op1 - $op2;
        if($value!=$goodresult){
           $validator->addError('math', 'the value should be '.$value);
            return false;
        }
        break;
         
}
return true;