$\left(6ab-b\right)^2$

$5\left(x-4\right)+\left(x+4\right)\left(x-4\right)-\left(x-4\right)^2$

$\frac{\sin\left(x+y\right)-\sin\left(x+y\right)}{\cos\left(x+y\right)+\cos\left(x-y\right)}$

$\int_2^4\:\left(x^2-4\right)^{\frac{3}{2}}\:dx$

$\sqrt{x^2-2x+6}+\sqrt{x^2-6x+10}=4$

$-5a^2+3a\left(a-1\right)$

$10+\left(2\right)+\left(-2\right)+3$