$\frac{a+1}{b}=\frac{a-1}{b}+\frac{b+1}{a}$
$f\left(x\right)=x^3-6x^2$
$5y+5z+1b-7y-5z+3b$
$3\left(-2\right)^2-5$
$\left(e^x-e^-x\right)^2$
$8^{x-7}=2^{x^2+2x-51}$
$16x-16xy+16y^2$
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