$\int\frac{6}{\left(x+x^2\right)^3}dx$
$sec\left(x\right)\csc\left(x\right)-\sec\left(x\right)$
$\left(2a^2b^4z\right)\left(6a^3b^2z^5\right)$
$\left(6+7-1+5\right)-\left(3+4-9+2\right)$
$3x+7y+8+4x+2y-10$
$-5.23-.73$
$\frac{x^4+2}{x^2+2x+4}$
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