Question

(Un intreg si 1 pe 3 + 5 supra 7 ) + (11supra 3 - 12 supra 7) = ? 
3 intregi si 1 supra 11 - (2 intregi si 2 supra 23 + 23 supra11 ) - 20 supra 23)
(3 - radical de 5) + (radical de 5 - 4 ) = ? 
(1 +2radical2 ) - (3radical2) - 7 ) - (8 - radical 2) VA ROG HELP 

Answer 1

a) (1intreg $\frac{1}{3}$ + $\frac{5}{7}$)+($\frac{11}{3}$-$\frac{12}{7}$)=
($\frac{5}{3}$ + $\frac{5}{7}$) + ($\frac{11}{3}$-$\frac{12}{7}$)
($\frac{35}{21}$ + $\frac{15}{21}$) + ( $\frac{77}{21}$-$\frac{36}{21}$)
$\frac{50}{21}$ + $\frac{41}{21}$=$\frac{91}{21}$
b)(1+2√2) - (3√2) - 7 - (8-√2)
(1+8) - ( 18) -7-(8-2)
9-18-13=-22