$x\int_2^{x^2}sen\left(t^3\right)dt$

$4+2x^2<2\left(3-x\right)^2$

$\frac{dy}{dx}\left(x^4+x^2y^2-y^5=2x+1\right)$

$5x+8x$

$\lim_{x\to0}\left(\frac{1-cosx\sqrt{cos2x}}{tan^2x}\right)^{\frac{1}{x^2}}$

$\left[-x+2y=4\right]\left[2x-4y=3\right]$

$\left(\frac{6}{5\sqrt[3]{3x}}\right)\left(-\frac{6}{5\sqrt[3]{3x}}\right)$