Question

(6*8:4-20:5*3+6*7:1):(18:3:3+32:8)=
(8*7+7*7+6*7)-(24:3+80:8+35:7)=
(9*3:3+40:8):2+899=
(64:8:2+3*10:6)*(63:7-24:6)+378=

Answer 1

(6x8:4-20:5x3+6x7:1):(18:3:3+32:8)=
(48:4-4x3+42:1):(6:3+4)=
(12-12+42):(2+4)=
(0+42):6=
42:6=7

(8x7+7x7+6x7)-(24:3+80:8+35:7)=
(56+49+42)-(8+10+5)=
147-23=124

(9x3:3+40:8):2+899=
(27:3+5):2+899=
(9+5):2+899=
14:2+899=
7+899=906

(64:8:2+3x10:6)x(63:7-24:6)+378=
(8:2+30:6)x(9-4)+378=
(4+5)x5+378=
9x5+378=
45+378=423