realiza las siguientes sumas $y$ restas algebraicas.
$2ab+4bc+12ab+5$
$2abc+30ca+4cab+cba=$
$2k+3y+4z+12k+7w+8z=$
$2xy-6xy+3xy-13xy=$
$2ab$
$a04a0+20c7a0-0a+20c4$
$xm13km+3\left(m-10smxm-km4$
$7km-13km+3km-10$
$21x+4y-6z.13x-14y-11z=$
$2abc-30ca-4cab+coa=$
$2a$
$2a0c+30c2+4ca0=c03$
$2abc+36$
$16mnx-18mny+13mnxmny-2mmx+10m7y$
$2x+3y+5-4x-y-10+4x-2y+7=$