10 x {1,56-[4,6-(2,7x3,8-5,46) :1,5]:2,5}=
=10 x {1,56-[4,6-(10,26-5,46) :1,5]:2,5}=
=10 x [1,56-(4,6-4,8 :1,5):2,5]=
=10 x [1,56-(4,6-3,2):2,5]=
=10 x (1,56-1,4:2,5)=
=10 x (1,56-0,56)=
=10 x 1=10
2² x { 3²-[2¹⁰ x (5²x 5⁶ x 25³:125⁴ - 3²)+2¹³]:2¹²=
= { 3²-[2¹⁰ x (5²x 5⁶ x 5⁶:5¹² - 3²)+2¹³]:2¹⁰=
= 3²-2¹⁰ x[ (5² - 3²)+2³]:2¹⁰=
= 3²-[(5 - 3)(5+3)+2³]=
= 3²-(2×2³+2³)=
= 3²- 2³(2+1)=
= 3²- 2³×3=
=3×(3-2³)=
=3×(3-8)=-15
