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(2pe 7 +3pe4-3pe14)-7pe3:5pe8=

Răspuns :

(2/7 +3/4-3/14)-7/3:5/8=
=
(2*4+3*7-3*2)/28-7/3 ×8/5=
=(8+21-6)/28-7/3 ×8/5=
=23/28-56/15=
=(23*15-28*56)/28*15=
=(345-1568)/420=
=-1223/420