$\sin^2\left(x\right)+4cos\left(x\right)+11=1$

$\frac{2\cos\left(x\right)}{\left(4cos\left(x\right)\right)^{\frac{3}{2}}}$

$1=\cos^2\left(a\right)-sen^2\left(a\right)$

$\frac{d^2y}{d^2x}\left(xy+y^3=2\right)$

$\int-\frac{1}{\left(3-x^2\right)^{0.5}}dx$

$42^2-38^2$

$\left(7x^{2a+1}+13y^{3a+2}\right)^2$