$\left(3+2i\right)+\left(4+5i\right)$
$\frac{dx}{dx}=\frac{xy}{2}$
$-3+3+3-1+8$
$\int sen^4\left(7x-2\right)dx$
$1^3-2^7\cdot1^5+6$
$x-2xy+x^2y+y=0$
$45=5t+45$
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