$m-n+y;m=-2\:;\:n=7y=3$

$\int\left(cos4xcos\left(-3x\right)\right)dx$

$\lim_{x\to\infty}\left(\frac{8x^2-3}{2x}\right)$

$168x^2-81x^8$

$ln\left(x^{7cos\left(x\right)}\right)$

$\left(\sqrt{2\cdot4^2\cdot\frac{1}{2}}\right)$

$\left(\frac{x^a}{y^{b-a}}+\frac{y^b}{x}\right)^b$