$\left(x-6y\right)^2+\left(3x-7\right)\left(x-2\right)-12\left(3y^2-5\right)+12xy$
$23.99\cdot0.13$
$-4300\:-6000$
$\frac{1}{2cosx\left(1-2cosx\right)}$
$\int\sin^5t\:dt$
$6\cdot54$
$\int\frac{x}{\sqrt{121x^2-1}}dx$
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