$\frac{dy}{dx}-xy^2=y^2+x+1$
$\frac { x ^ { 4 } - x ^ { 3 } + x ^ { 2 } - x - 1 } { x - 10 }$
$\left(8pq+2p^3q^2\right)^3$
$3^2\cdot\left(-3\right)^2$
$-2-20a=-20a-2$
$\frac{1+\sec^{2}\theta}{\sec^{2}\theta}=1+\cos^{2}\theta$
$15-\left(14+5\right)$
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