Question

20+{48+[9×(48÷4)]+1}-74

Answer 1

$20+\{48+[9\cdot(48:4)]+1\}-74=\\ \\=20+\{48+[9\cdot12]+1\}-74=\\ \\=20+\{48+108+1\}-74=\\ \\=20+157-74=\\ \\=103$

Answer 2

20+{48+[9x(48÷4)]+1}-74=
20+{48+[9x12]+1}-74=
20+{48+108+1}-74=
20+{156+1}-74=
20+157-74=
177-74=
103