$-5-7+14+1\:$
$x^4-x^3+3x^2+4\cdot3x-2$
$\frac{4^{-2}y^{-3}}{4y^{-2}}$
$7^2y+21y^3$
$\left(y-4x\right)\left(y+4x\right)$
$10^5\cdot10$
$\int x^2\:e^{\left(2x+1\right)}\:dx$
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