$-6x^2+16x+16$
$\frac { x + 2 } { x ^ { 2 } + 4 x }$
$\int_0^{\frac{\pi}{4}}\left(x\sec^2\left(y\right)\right)dy$
$\log\left(x+3\right)^4=12$
$-4\left(7n-6\right)+4n$
$a^2-b^2=a+b$
$5ab-3ab-7+2ab+11$
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