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1. Calculati 2a+3 6+c, stünd că:
a=(5+5:5+2-2:2)x2

b= [36-16:(25:5-12:3)]:5-4

c = 7+3x[2-27 :(5x5+2:1)]

2. 104-64: { 13 - 12:[22-5x (38-4xX)] +4} = 100

3. 8+8x {8 +8x[8 +8x (8-8)]} +8:8=