$\cos a+\sin a\cdot\tan a=\sec a$
$\frac{x^{\frac{3}{2}}}{x^4}$
$\int\:\frac{x^2-3x+3}{x^2-3x+2}dx$
$2x+1\:+\:2x-1\:area$
$0.5\cdot10$
$\left(\frac{1}{9}x^2+\frac{2}{3}y^2\right)^2$
$\left(10-15\right)+2\left(3+1\right)+8$
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