5•2-1•5= 14+4•3-5= 12+7-4•6= 78-24+13•5=

Question

5•2-1•5=
14+4•3-5=
12+7-4•6=
78-24+13•5=

Comments

1)21

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1)5,2)21,3)-5,4)119

Answer 1

5*2-1*5=5
14+4*3-5=36
12+7-4*6=5
78-24+13*5=119
65+54=119