Odpowiedź:
a) 4(3a+5)+3(5a-2) = 12a+20+15a-6 = 27a+14
b) 2(7p-3)-5(3p-1) = 14p-6-15p+5 = -p-1
c) -5(2-3m)-2(m+8) = -10+15m-2m-16 = 13m-26
d) 2x(3x-4)+x(5-2x) = 6x²-8x+5x-2x² = 4x²-3x
e) 3u(2-4u)-5u(u+3) = 6u-12u²-5u²-15u = -17u²-9u
f) -5t(2t-1)-2t(3-5t) = -10t²+5t-6t+10t² = -t
