Помогите сроооочнооооо!даю 45 баллов!номер 1 и 2

Номер 1 1)8,4*(-5,7)=[latex] - \frac{84}{10} * \frac{57}{10} = -\frac{84}{10} * \frac{57}{10}= \frac{4788}{100} =-47,88 [/latex] 2) = [latex]- \frac{28}{3} *- \frac{26}{21} = \frac{728}{63} = 11\frac{35}{63} [/latex] 3)=[latex] \frac{2223}{100} :- \frac{9}{10} = - \frac{2223}{100} * \frac{10}{9} =- \frac{247}{10} =-24,7[/latex] 4)=[latex] -\frac{2898}{100} :-14 = \frac{2898}{100*14} = \frac{207}{100} =2,07[/latex] Номер 2 1)=25,2*x*y 2)=-5m+4p 3)=k-17+k-k+30=k+13 4)=-24-6a+8a-48=2a-72