20x[1+2x2⁴⁹+5⁹⁴:5¹⁴+(3²)¹⁰⁰]:(1+2⁵⁰+5⁸⁰+3²⁰⁰)=20x[1+2⁵⁰+5⁸⁰+3²⁰⁰]:(1+2⁵⁰+5⁸⁰+3²⁰⁰)= 1
{[(2⁶x3¹⁰x5⁷):(2⁶x3⁹x5⁵)-70]x2²+1}:(15-2³)={[(2⁶x3¹⁰x5⁷):(2⁶x3⁹x5⁵)-70]x2²+1}:(15-2³)= (3*5²-70)x4+1=(3x25-70)x4+1=21
2¹³:4⁶+5³-5²x[729:3⁵+16:(7x9-55)]=2¹³: 2¹²+5³-5²x[27²:3⁵+16:(63-55)]=
=2+75- 25x(3⁶:3⁵+16:8)=2+75- 25x(1+2)=77- 25*3=77-75=2
