Error message

  • Warning: preg_match(): Unknown modifier '2' in os_check() (line 252 of /var/www/custom/tools/tools.inc).
  • Warning: preg_match(): Unknown modifier 'T' in os_check() (line 252 of /var/www/custom/tools/tools.inc).
Result
Yo momma's so fat that objects 5 meters away accelerate at 1 m/s^2 toward her. What is yo momma's mass if G = 6.67x10^-11Nm^2/kg^2?

Please, someone help me, I can't solve it and it's making me nuts.