Упростите Выражения!
а+b×B=
с-d+(-c)=
2.7+a+(-A)+1.8=
(6.2)+(-a)+(-b)-a-b+10.9=

a + b*b = a +b^2c - a + ( - c) = c - a - c = -a2.7 + a + (-a) + 1.8 = 4.5 + a - a = 4.56.2 + (-a) + ( -b) - a - b + 10.9 = 17.1 - a - b - a- b = 17.1 - 2a - 2b