$x^2+10\cdot25$

$\left(6x\right)\left(2x+3\right)$

$xy^'=y+\sqrt{\left(x^2-y^2\right)}$

$\int_0^{\frac{\pi}{6}}sec^2\left(x\right)dx$

$\int\frac{22x^2}{sqrt\left(100-x^2\right)}dx$

$15x^2y^2-5xy^2-150y^2$

$\frac{sec\left(x\right)-tan\left(x\right)}{cos\left(x\right)}$