$2\sin\left(x\right)+2\cos\left(y\right)$
$1\left(3\right)+3\left(1\left(-2\right)+1\left(1\right)\right)$
$\frac{2x-1}{x}<-2$
$\int_9^{15}\left(7.1e^{-.027x}\right)dx$
$\cos^2+\cos^2\sin^2=\cos2$
$8x^2+16x+44$
$\left(3x^2\right)\left(4x^2y\right)$
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