(20*3^-4 -(3/4)^-4 * (-1/2)^2) / 10^-1 + (-1/8)^0

(20*3⁻⁴ -(3/4)⁻⁴ * (-1/2)²) / 10⁻¹ + (-1/8)⁰= =[20*(⅓)⁴-(⁴/₃)⁴*(¼)]/(¹/₁₀) +1= =[20*(¹/₈₁)-(4⁴/(3⁴*4)] *10+1= =[²⁰/₈₁ -4³/3⁴]*10 +1= =[²⁰/₈₁ -⁶⁴/₈₁]*10+1= =-⁴⁴/₈₁ *10 +1=-⁴⁴⁰/₈₁ +⁸¹/₈₁=-³⁵⁹/₈₁=-4 ³⁵/₈₁

(20*1/3^4 - (4/3)^4*1/4)/1,1 = (20*(1/81) - 64/81)/10/11= (20/81-64/81)*10/11 = -40/81