$20-17+13x-20+4x$
$\int\left(e^{cos\left(7t\right)}sin\left(7t\right)\right)dt$
$\int\frac{2x^2}{x-3}dx$
$.25\left(-2\right)^2$
$\frac{dy}{dx}=\frac{x^2+2}{\sec^2\left(y\right)}$
$x+3yz+y+3xz$
$5\cdot\left(2+4\right)-6$
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