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

$45x^{10}-30x^6-10x^4$

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

$2y\left(y^2+2y\right)-\left(y^2-y\right)$

$\csc\left(x\right)\frac{1}{1+\cot^2\left(x\right)}$

$3^0+4^0-2^0-2\sqrt{3}^0+\left(-3\right)^0-\left(-4\right)^0$

$12x+6x^2;x=0$