Applicare la formula: $a+\frac{b}{c}$$=\frac{b+ac}{c}$, dove $a=\frac{100}{169}m^2n^6a$, $b=-225f^4y$, $c=a^4z^{12}$, $a+b/c=\frac{100}{169}m^2n^6a+\frac{-225f^4y}{a^4z^{12}}$ e $b/c=\frac{-225f^4y}{a^4z^{12}}$

Applicare la formula: $x\cdot x^n$$=x^{\left(n+1\right)}$, dove $x^nx=\frac{100}{169}m^2n^6a\cdot a^4z^{12}$, $x=a$, $x^n=a^4$ e $n=4$

Applicare la formula: $a+b$$=a+b$, dove $a=4$, $b=1$ e $a+b=4+1$