text: i'm having a hard time with these math problems...? here they are...  1+ 4 3 x 21 4 - 8 man, they sure are being hard on kids these days. you really shouldn't trust people giving you answers here, they most likely pulled their answers from a faulty wikipedia answer. i'd look up the number for your nearest university, call, and then ask to speak to the dean of the engineering college. he'd at least have a chance at getting these.