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f) 10*(3+2)-5*(7-3)=10*5-5*4=50-20=30
g)2*9 [ Do potęgi 2 ] 3*7 [ Do potęgi 2 ]=2*81*3*49=162*147=23814
h)2*(5 [ Do potęgi 2 ] 5 ) :2 [ Do potęgi 2 ]=2*(25*5):4=2*125:4=250:4=62,5
i) 4*3 [ Do potęgi 2 ] +5*2-20:2*3=4*9+10-20:2*3=36+10-20:2*3=46-20:2*3=46-20:6=46-3 2/6=42 4/6=42 1/3