$\lim_{x\to\infty}\left(\frac{2e^{2x}}{\left(1+x\right)}\right)$
$\left(a+1\right)\left(a-1\right)\left(a-3\right)\left(a+3\right)$
$\frac{\left(42^6-56x^4+28x^2\right)}{14^2}$
$36a^5b^2-27a^3b^3+54a^4b^5$
$\int_1^t\sin\left(x\right)dx$
$dy-\sin\:\left(x+y\right)dx=0$
$\left(3x-x^2\right)\left(3x+x^2\right)$
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