Спростіть вираз:

1)м+29м

2)98р-р

3)4х+13х+15х

4)67х-18х+37

Треба СПРОСТИТИ  а не РІШАТИ, в другий раз говорю!

связь строения костей с выполняемыми ими функциями на примере нижней конечности.Даю пункты за правильные ответы.

In March the English people have two holidays: St.Patrick's Day and Mother's Day. St.Patrick's Day falls on the 17th of March. It is a national holiday in Ireland. On that day people send greeting cards and wear a shamrock. A shamrock is the national emblem of Ireland.
On Mother's Day people in the family try to let their mother have a rest. A father and the children do the housework, cook some tasty dishes or bake a cake.
There is one more popular holiday in spring - Easter. People celebrate it in April or in early May. On Easter Sunday the children get chocolate Easter eggs or rabbits.
in April there is a holiday for fun - April Fool's Day. It is on the 1st of April. On that day the English children like to play jokes and tricks on other people.

За 3 часа 4 солдата почистили 2 ведра картошки. Сколько Ведер картошки начистили бы 3 солдата за 2 часа.

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найдите область определения функции 
под корнем 12х-3х в кводрате.
в кводрате только 3х