$=\frac{3x+2}{x\left(x+2\right)^2+16x}$
$x^2+9x=16$
$\csc^2\left(x\right)\cos^2\left(x\right)\frac{\sin\left(x\right)}{\tan^2\left(x\right)}$
$\left(1+x^4\right)^2$
$-5\cdot2-16$
$m^2+3m-27$
$\left(\frac{1}{7}x\:-\:5y\right)^2$
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