$40\cdot44$
$-\:7\:+\:\left[\:-\:4\:\left(\:-\:2\:-\:3\:\right)\:+\:5\:-\:\left(\:-\:10\:-\:2\right)\right]\:+\:15$
$10x^2y\:-5x^3y-15x^2y^2$
$\frac{\frac{1}{\cos\left(x\right)}}{\tan\left(x\right)}=1$
$\frac{4.98314}{250.1}$
$-2+8+2+17$
$\frac{a^8-256}{a^4-16}$
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