3(х+3)-3(4-х)-х-3=3*х+3*3-3*4-3*(-х)-х-3=9х+9-12+3х-х-3=9х+3х-х+9-12-3=11х-6
3(х+5)-(4-х)-(1+3)х-3=3*х+3*5-4+х-1*х-3*х-3=3х+15-4+х-х-3х-3=3х+х-х-3х+15-3=8
2(х+4)-3(2-х)-х-4=2*х+2*4-3*2-3*(-х)-х-4=2х+8-6+3х-х-4=2х+3х-х+5-6-4=4х-2
х+1-5(2-х)-(5+1)х-5=х+1-5*2-5*(-х)-5*х-1*х-5=х+1-10+5х-5х-х-5=-14
х+3-(2-х)-х-4=х+3-2+х-х-4=х+х-х+3-2-4=х-3