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a²-3a+1=(-4)²+3×(-4)+1=16+(-12)+1=16-12+1=4+1=5
1+x(x+4)=1+x²+4x=1+(-11)²+4*(-11)=1+121-44=122-44=78
x-2y =1-2*(-1)=1-(-2)=1+2=3
2x²-y(x+1)=2x²-xy-y=2*(-2)²-(-2)*5-5=2*4-(-10)-5=8+10-5=18-5=13
(m+1)(n-2)=mn-2m+n-2=2*1-2*1+1=2-2+1=1
a do potęgi 2- 3a + 1=-4²⁻¹²=-4⁻¹⁰=-(¼)¹⁰=-¹/₁₀₄₈₅₇₆
1+x(x+4)= -10×(-7)=70
x-2y=1-1=0
2x do potęgi 2 - y(x +1)=2×(-2)²⁻⁵⁻¹=4⁻⁴=(¼)⁴=¹/₂₅₆
(m+1)(n-2)=(2+1)(1-2)=2-4+1-2=-3