$2^4+3^4-4^3$
$12x+25x^2+40$
$\frac{d^2}{dx^2}\sec\left(x\right)^3$
$\frac{2}{\left(1-x\right)^3}$
$75+12+32\:18$
$35+\left(9\left(3+\left(2+7\right)\right)\right)$
$\int\frac{3}{\left(x^4+x^2\right)}dx$
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