Moltiplicare il termine singolo $\frac{d^2y}{dx^2}$ per ciascun termine del polinomio $\left(x^{-1}-\frac{1}{5}x^6+\frac{1}{4}x^5-x^3\right)$

Applicare la formula: $-\frac{b}{c}$$=\frac{expand\left(-b\right)}{c}$, dove $b=d^2y$ e $c=dx^2$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=-1$, $b=5$, $c=d^2y$, $a/b=-\frac{1}{5}$, $f=dx^2$, $c/f=\frac{d^2y}{dx^2}$ e $a/bc/f=-\frac{1}{5}x^6\frac{d^2y}{dx^2}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=1$, $b=4$, $c=d^2y$, $a/b=\frac{1}{4}$, $f=dx^2$, $c/f=\frac{d^2y}{dx^2}$ e $a/bc/f=\frac{1}{4}x^5\frac{d^2y}{dx^2}$