$4a^2-2ab+9b^2\cdot7a^2+5ab-2b^2$

$100+35.758$

$3a+7b-4c-7a+10b-5c-6a-5b-c$

$\int\frac{\sin\left(x\right)}{\cos^3\left(x\right)+cos^3\left(x\right)+2\cos\left(x\right)}dx$

$2logx-1\:=\:log\left(1-2x\right)$

$\int\frac{\left(x^2+1\right)\left(x^2-2x\right)}{\sqrt[3]{x^2}}dx$

$\frac{x^3}{x-3}$