$x^3+4x^2+3x$
$\left(x+4\right)^2+81-18\left(x+4\right)$
$\frac{\sin^2x+\sin^2x\cos x}{1+\cos x}$
$\int\frac{\left(x^2+x-3\right)}{3x}dx$
$cot\left(x\right)\left[cos\left(x\right)tan\left(x\right)+sin\left(x\right)\right]$
$a^2-8a+9$
$2\left(1\cdot y\right)$
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