Add the decimals:

\(0.72 + 3.018 = 3.738\).

\(1.8 \times 0.3 = 0.54\).

\(72 \div 0.09 = 800\).

\(4 - 2.8 = 1.2\).

\(5.4 \div 6 = 0.9\).

\(9 \div 4 = 2.25\).

Common denominator 6:

\(\dfrac{1}{3} = \dfrac{2}{6}\), so \(\dfrac{2}{6} + \dfrac{5}{6} = \dfrac{7}{6}\).

Write 18 as \(\dfrac{18}{1}\):

\(\dfrac{4}{9} \times 18 = \dfrac{4}{9} \times \dfrac{18}{1} = \dfrac{4 \times 18}{9} = \dfrac{72}{9} = 8\).

Dividing by a fraction is the same as multiplying by its reciprocal:

\(10 \div \dfrac{5}{11} = 10 \times \dfrac{11}{5} = \dfrac{10 \times 11}{5} = \dfrac{110}{5} = 22\).

Convert to improper fractions:

\(4\dfrac{2}{7} = \dfrac{30}{7}\), \(1\dfrac{4}{9} = \dfrac{13}{9}\).

\(\dfrac{30}{7} - \dfrac{13}{9} = \dfrac{270}{63} - \dfrac{91}{63} = \dfrac{179}{63}\).

Common denominator 63:

\(\dfrac{3}{7} = \dfrac{27}{63}\), \(\dfrac{2}{9} = \dfrac{14}{63}\).

\(\dfrac{27}{63} - \dfrac{14}{63} = \dfrac{13}{63}\).

\(\dfrac{46}{75} \div \dfrac{23}{45} = \dfrac{46}{75} \times \dfrac{45}{23} = \dfrac{46 \times 45}{75 \times 23}\).

\(46 = 2 \times 23\), so it simplifies to \(\dfrac{2 \times 45}{75} = \dfrac{90}{75} = \dfrac{6}{5}\).

\(2\dfrac{3}{8} = \dfrac{19}{8}\), \(4\dfrac{1}{6} = \dfrac{25}{6}\).

Common denominator 24:

\(\dfrac{19}{8} = \dfrac{57}{24}\), \(\dfrac{25}{6} = \dfrac{100}{24}\).

Sum: \(\dfrac{57}{24} + \dfrac{100}{24} = \dfrac{157}{24}\).

\(8\dfrac{3}{4} = \dfrac{35}{4}\), \(1\dfrac{3}{14} = \dfrac{17}{14}\).

\(\dfrac{35}{4} \times \dfrac{17}{14} = \dfrac{35 \times 17}{4 \times 14} = \dfrac{595}{56} = \dfrac{85}{8}\).

Multiply numerators and denominators:

\(\dfrac{7 \times 8}{16 \times 35} = \dfrac{56}{560} = \dfrac{1}{10}\).

Write 4 as \(\dfrac{4}{1}\):

\(\dfrac{2}{3} \div 4 = \dfrac{2}{3} \times \dfrac{1}{4} = \dfrac{2}{12} = \dfrac{1}{6}\).

\(1\dfrac{3}{5} = \dfrac{8}{5}\).

Write 6 as \(\dfrac{30}{5}\).

\(\dfrac{30}{5} - \dfrac{8}{5} = \dfrac{22}{5}\).

\(1\dfrac{3}{5} = \dfrac{8}{5}\), \(5\dfrac{1}{3} = \dfrac{16}{3}\).

\(\dfrac{8}{5} \div \dfrac{16}{3} = \dfrac{8}{5} \times \dfrac{3}{16} = \dfrac{24}{80} = \dfrac{3}{10}\).

Convert all to improper fractions and simplify carefully.

The final simplified value is \(\dfrac{463}{27}\).

Compute the division of mixed numbers first, then subtract and multiply.

The final result is \(\dfrac{5}{4}\).

First: \(-1.42 - (-3.22) = 1.8\).

Then: \(\dfrac{1.8}{-0.4} = -4.5\).

Next: \((-6) \times (-0.7) = 4.2\).

Sum: \(-4.5 + 4.2 = -0.3\).

First simplify the numerator:

\(-\dfrac{7}{18} + \dfrac{11}{12} = \dfrac{13}{36}\).

Then divide by \(-\dfrac{19}{48}\):

\(\dfrac{13}{36} \div -\dfrac{19}{48} = \dfrac{13}{36} \times -\dfrac{48}{19} = -\dfrac{4}{3}\).

Carefully convert to improper fractions and simplify.

The final value is \(1\).

Multiply first, then subtract step by step.

The simplified answer is \(\dfrac{58}{5}\).

Convert mixed numbers to improper fractions, then divide, add, and multiply.

The final result is \(\dfrac{5}{4}\).

\(-3.25 - 2.75 = -6.0\).

\(-6.0 \div -0.6 = 10\).

\(0.8 \times (-7) = -5.6\).

So \(10 + (-5.6) = 4.4\).

Convert to improper fractions and simplify:

The simplified result is \(-\dfrac{7}{10}\).

Sum: \(-12 + 8 = -4\).

Product: \(-4 \times 0.5 = -2\).

Product: \(-12 \times 8 = -96\).

Sum: \(-96 + 0.5 = -95.5\).

Sum: \(-1.6 + (-1.2) = -2.8\).

Difference: \(-1.6 - (-1.2) = -0.4\).

Quotient: \(-2.8 \div -0.4 = 7\).

Sum: \(-10 + 6 = -4\).

Square: \((-4)^2 = 16\).

Squares: \((-10)^2 = 100\), \(6^2 = 36\).

Sum: \(100 + 36 = 136\).