Substitution

This is a process for changing the variables an expression is based on. It is like solving an equation, but the solution will have letters in it which you still don't know.

It allows you to take a formula based on one variable, and turn it into a formula based on something else.

Example 1, suppose -mathformula not MarkupType-
Fatal error: Uncaught Error: Call to undefined method mathformula::makeTypeDef() in /var/www/vhosts/ent.storkey.uk/html/inc/reporting2.php:365 Stack trace: #0 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(189): echo_value('algsubstitute', 'content', Array) #1 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(742): dynaPage->echo_value('content') #2 /var/www/vhosts/ent.storkey.uk/html/inc/dynaPage.php(179): mainPanel->write('main-panel') #3 /var/www/vhosts/ent.storkey.uk/html/index.php(21): dynaPage->write() #4 {main} thrown in /var/www/vhosts/ent.storkey.uk/html/inc/reporting2.php on line 365