$\left(\frac{3}{5}\right)^2+2\frac{3}{5}x\frac{5}{7}+\left(\frac{5}{7}\right)^2$
$\frac{\left(x^2-x\:-20\right)}{\left(3x^2-15x\right)}$
$\frac{ydy}{t}=dt$
$\lim_{x\to3}\left(\frac{x^3-x^2-10x+12}{x^3-2x-3}\right)$
$x^2-x+8$
$-11-10+6+1$
$\left(x-10\right)=2x-1$
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