a) P=\(\dfrac{2}{3}-\left(-\dfrac{1}{4}\right)+\dfrac{3}{5}-\dfrac{7}{45}-\left(-\dfrac{5}{9}\right)+\dfrac{1}{12}+\dfrac{1}{35}\)

P=\(\dfrac{2}{3}+\dfrac{1}{4}+\dfrac{3}{5}-\dfrac{7}{45}+\dfrac{5}{9}+\dfrac{1}{12}+\dfrac{1}{35}\)

P=\(\dfrac{11}{12}+\dfrac{3}{5}-\dfrac{32}{45}+\dfrac{1}{12}+\dfrac{1}{35}\)

P=\(\dfrac{11}{12}+-\dfrac{1}{9}+\dfrac{1}{12}+\dfrac{1}{35}\)

P=\(\dfrac{-1}{36}+\dfrac{7}{60}\)

P=\(\dfrac{192}{2160}\)

P=\(\dfrac{23}{160}\)

b) Q=\(\left(5-\dfrac{3}{4}+\dfrac{1}{5}\right)-\left(6+\dfrac{7}{4}-\dfrac{8}{5}\right)-\left(2-\dfrac{5}{4}+\dfrac{16}{5}\right)\)

Q=\(5-\dfrac{3}{4}+\dfrac{1}{5}-6-\dfrac{7}{4}+\dfrac{8}{5}-2+\dfrac{5}{4}-\dfrac{16}{5}\)

Q=\(\left(5-6-2\right)+\left(-\dfrac{3}{4}-\dfrac{7}{4}+\dfrac{5}{4}\right)+\left(\dfrac{1}{5}+\dfrac{8}{5}-\dfrac{16}{5}\right)\)

Q=\(-3-\dfrac{5}{4}-\dfrac{7}{5}\)

Q=\(\dfrac{-17}{4}-\dfrac{7}{5}\)

Q=\(\dfrac{-85}{20}-\dfrac{28}{20}\)

Q=\(-\dfrac{113}{20}\)

a) A=(\(\left(\dfrac{1}{3}-\dfrac{8}{15}-\dfrac{1}{7}\right)+\left(\dfrac{2}{3}+-\dfrac{7}{15}+1\dfrac{1}{7}\right)\)

A=\(\left(\dfrac{1}{3}+\dfrac{2}{3}\right)+\left(\dfrac{-8}{15}+-\dfrac{7}{15}\right)+\left(\dfrac{-1}{7}+\dfrac{8}{7}\right)\)

A=\(\dfrac{3}{3}+-\dfrac{15}{15}+\dfrac{7}{7}\)

A=\(\dfrac{1}{1}+\dfrac{-1}{1}+\dfrac{1}{1}\)\

A=\(0+\dfrac{1}{1}\)

A=\(\dfrac{1}{1}\)

A=\(1\)

b) B=\(0,25+\dfrac{3}{5}-\left(\dfrac{1}{8}-\dfrac{2}{5}+1\dfrac{1}{4}\right)\)

B=\(\dfrac{25}{100}+\dfrac{3}{5}-\left(\dfrac{1}{8}-\dfrac{2}{5}+\dfrac{5}{4}\right)\)

B=\(\dfrac{1}{4}+\dfrac{3}{5}\left(\dfrac{1}{8}-\dfrac{2}{5}+\dfrac{5}{4}\right)\)

B=\(\left(\dfrac{1}{4}-\dfrac{5}{4}\right)+\left(\dfrac{3}{5}+\dfrac{2}{5}-\dfrac{1}{8}\right)\)

B=\(\dfrac{-4}{4}+\dfrac{5}{5}-\dfrac{1}{8}\)

B=\(-1+1-\dfrac{1}{8}\)

B=\(\dfrac{-1}{8}\)

bruh

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