"2021减1979等于多少"...2021减1979等于多少

　"2044减2021"...2044减2021

　"2024-537减463-x+2"...2024-537减463-x+2

　"2024+2024等于几"...2024+2024等于几

　"202-194等于几"...202-194等于几

　"2023+4190等于几"...2023+4190等于几

　"2049减2021"...2049减2021

　"2024=多少"...2024=多少

　"1409+204减206+2等于几"...1409+204减206+2等于几

　"202+499等于几"...202+499等于几