$2\cos\left(x\right)-2\cos^2\left(x\right)=0$

$\left(-1\right)\left(9\right)+\left(6\right)\left(-6\right)$

$x\frac{dy}{dx}-y=x^2y$

$f\left(x\right)=\ln\left(x^2+x^3\right)$

$3^0\cdot4^2^3$

$\frac{\left(1+\sin\left(x\right)\right)^2}{\cos^2x}=\frac{1+\sin\left(x\right)}{1-\sin\left(x\right)}$

$\int\left(-2x^2+5\right)\sin\left(2x^3-15x+8\right)du$