Applicare la formula: $\frac{a}{b}+c$$=\frac{a+cb}{b}$, dove $a/b+c=2.12-\frac{3}{2}$, $a=-3$, $b=2$, $c=\frac{53}{25}$ e $a/b=-\frac{3}{2}$

Applicare la formula: $ab$$=ab$, dove $ab=2.12\cdot 2$, $a=\frac{53}{25}$ e $b=2$

Applicare la formula: $a+b$$=a+b$, dove $a=\frac{106}{25}$, $b=-3$ e $a+b=-3+4.24$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=\frac{31}{25}$, $b=2$ e $a/b=\frac{1.24}{2}$