$\left(2x+1\right)-2$

$\frac{cos2x-sin2x+1}{sinx-cosx}$

$3-6\:\sin\left(x\right)=4-8\:\sin\left(x\right)$

$\int\frac{6+x^3}{x^3\left(x^2+x\right)}dx$

$\left(\frac{2}{3}x^2-\frac{1}{4}y^2+\frac{3}{5}xy\right)\left(2y-\frac{3}{2}x\right)$

$\int\frac{\left(x^3\right)}{sqrt\left(x^2+16\right)}dx$

$5-\left(-19\right)$