$-7x+3=10$
$\lim_{x\to-5}\left(\frac{x^2-25}{3x+5}\right)$
$x^2-3x-8-\frac{1}{2}x+\frac{2}{3}$
$\frac{90w^3}{-18w^3}$
$\frac{\sec^2\left(x\right)}{\sec^2\left(x\right)+1}$
$\frac{1}{3}x+14=26$
$\frac{dx}{dy}-y=0$
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