Applicare la formula: $ab$$=ab$, dove $ab=3\cdot -0.15$, $a=3$ e $b=-\frac{3}{20}$

Applicare la formula: $a+b$$=a+b$, dove $a=-\frac{9}{20}$, $b=-4$ e $a+b=10\cdot {\left(-0.15\right)}^2-0.45-4$

Applicare la formula: $a^b$$=a^b$, dove $a=-\frac{3}{20}$, $b=2$ e $a^b={\left(-0.15\right)}^2$

Applicare la formula: $ab$$=ab$, dove $ab=10\cdot 0.0225$, $a=10$ e $b=\frac{7}{311}$

Applicare la formula: $a+b$$=a+b$, dove $a=\frac{9}{40}$, $b=-\frac{89}{20}$ e $a+b=0.225-4.45$