$\int_0^{\infty}\left(e^xsen\left(x\right)\right)dx$
$3x^2-2x^3+x^2$
$9x^2+72x+144$
$z'-xz=-x$
$\int3t\:e^{11t}dx$
$\left(2a+b^3\right)^2$
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