oblicz
a) ( ⁻½ ) * 1 ⅗ + ⅛ =
b) ( - 1 ⅗ + ²/₄ ) * ( - 1 ⅗ ) =
c) ( - 7 ¼ ) * ( - 1 ½ ) + ( - 5 ½ ) =
d) ( - 1 ³/₁₂ ) * ( - 2 ¹/₃ ) - 1 ¹/₃ =
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