$10\sin^2\left(x\right)+\:3\cos\left(x\right)-9=10$

$z^2\:-\:4\:z\:+\:5\:=\:0$

$15\left(\frac{x^2-3x}{4}\right)+8\left(\frac{x^2-2x-3}{3}\right)+\left(\frac{x^2+x}{12}\right)$

$3x^2-6x-15$

$\frac{4x^3-2x^2+3x+2}{x-2}$

$194.8+178.9+190.0+184.1+190.4+176.8+186.6+194.6+187.7+193+186.6+181.4$

$\left(1-\sin^2\left(a\right)\right)\left(1-\tan^2\left(a\right)\right)$