math - How to split a longer formula into multiple lines with PHP? -

i have more complicated formulas php. cool if split formula multiple lines. know how strings, have no idea how within 1 single calculation.

i want like:

public function example_calc(){   $result = $var1 * $var2 +     + $var3 * $var4 -     - $var5 / $var6;   return $result; } 

don't duplicate + , - signs across lines, split normally

public function example_calc(){   $result = $var1 * $var2     + $var3 * $var4     - $var5 / $var6;   return $result; } 

or

public function example_calc(){   $result = $var1 * $var2 +     $var3 * $var4 -     $var5 / $var6;   return $result; } 

and cool work

it's ; marks end of "line" of code, not carriage return/line feed