v=5sa=2s2
v=5sa=2s2x=3oox=at2t=xat=3oo2s2=15os15os16os=41os41o5s4s3oo
v=st=3oo4s=75s754
75475s4
2o
2x5+4x1+2x3=1o+4+6=2o()2o
245
;
()()
f=pgv