$\int_1^{\frac{2}{\sqrt{3}}}\left(\frac{1}{25+16x^2}\right)dx$

$2x-y=-4$

$9x+3y+18$

$y'+y^2sinx=0$

$2\ln\left(x\right)-\ln\left(2x-9\right)=\ln\left(7x\right)-\ln\left(x-2\right)$

$a^2-0a+12$

$\ln\left(\frac{y+1}{y-1}\right)+\ln\left(\frac{y}{y+1}\right)-\ln\left(y^2+1\right)$