$26+2x-9x<10$

$\frac{dy}{dx}\:y=\frac{4}{3\pi}sin\left(3x\right)+\frac{4}{7\pi}cos\left(7x\right)$

$\int_{-40}^{\infty}\frac{-49\cos\left(x\right)}{20}dx$

$\int\frac{x+1}{x+2}dx$

$-nz^2+2x^3-nx^2+2xz^2$

$\int\frac{4}{25+4x^2}dx$

$\int_0^{\infty}\left(4\pi^2-2\pi x\right)\sin\left(x\right)dx$