$\int_{-1}^2\left(\frac{1}{1+\frac{y^2}{9}}\right)dy$
$m^2-6m-27=0$
$6y-8\cdot3y$
$23.5\cdot23.7$
$3x^2+27x-16y+48=0$
$\int\frac{x+\cos x}{3x^{2}+6\sin x}dx$
$5^{3x+10}=5^{8x-30}$
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