2(8+3a)+7(a-1) при а=7; ;5;
9(2b+3)+5(2-b) при b=1; 3;
7(5c+2)+3(1-c) при c=5; 0;
8(5+3d)+4(3-2d) при d=3; 4

2(8+3a)+7(a-1)=16+6a+7a-7=13a+913*7+9=91+9=10013*5+9=65+9=74============9(2b+3)+5(2-b)=18b+27+10-5b=13b+3713*1+37=13+37=5013*3+37=39+37=76============7(5c+2)+3(1-c)=35c+14+3-3c=32c+1732*5+17=160+17=17732*0+17=17============8(5+3d)+4(3-2d)=40+24d+12-8d=16d+5216*3+52=48+52=10016*4+52=64+52=116