$\frac{d^2}{dy^2}\left(x^2y^3+\left(2x+4y\right)^2\right)$
$\frac{\left(x+5\right)^{2}-\left(x-5\right)^{2}}{5}$
$\left(a+2\right)^2+\left(a+1\right)\cdot\left(a-1\right)-4a$
$\int\frac{1}{2}e^xdx$
$x^2+9x-136$
$\int_{-3}^2kx^2dx$
$\frac{13^{13}}{13\cdot13^9}$
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