$\int x^2e^{-14x}dx$
$4t-10$
$\left(2f^2+f\right)^2$
$\frac{x^3-32x^2+55}{x+5}$
$7-4cosx=7$
$2v+8v-5v$
$3-4-4-4-6+21+7+8$
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